You row a boat perpendicular to the shore of a river that flows at 3 m/s. The velocity of your boat is 4 m/s relative to the water. What is the velocity of your boat relative to the shore?

Answers

Answer 1

Answer:

The velocity vBW of the boat relative to the water is 4.0 m/s, directed perpendicular to the current, as in Figure 3.18.

Explanation:

Answer 2

The boat is perpendicular to the shore. Then the net velocity of the boat with respect to river is 5 m/s. The observer feels like the boat is moving slower than they appear actually.

What is relative velocity ?

Relative velocity is velocity of an object measured with respect to other object which can be of stationary or moving with a speed. Thus speed relative to another object is called the relative velocity.

The relative velocity is what's the speed for an observer but it differs from actual velocity. Sometimes it may slower or faster depending on the object with which a we are relating the speed.

Given that the speed of the boat = 4 m/s

speed of river = 3 m/s.

Both are perpendicular and the net velocity of the boat is :

r = √(3² + 4²) = 5 m/s.

Hence, the velocity of the boat relative to the shore will be 5 m/s.

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Related Questions


When an object is said to be in free fall, the object is actually moving..

Answers

... moving initially with the acceleration of gravity (9.8 m/s^2)

Find the mass if the force is 18 N and the acceleration is 2 m/s2.

Answers

Answer:

The answer is 9 kg

Explanation:

To find the mass given the force and acceleration we use the formula

[tex]m = \frac{f}{a} \\ [/tex]

where

f is the force

a is the acceleration

We have

f = 18 N

a = 2 m/s²

We have

[tex]m = \frac{18}{2} \\ [/tex]

We have the final answer as

9 kg

Hope this helps you

A student wants to shorten the ripening time for tomatoes. He predicts that the more water the seedlings receive, the faster the tomatoes will ripen. He grows 20 tomato plants in a garden with full sunlight that has dry soil and 20 tomato plants in the same garden where there is more moisture in the soil. He records the time it takes for fruit to develop and ripen on the plants in each location. What is the test variable (independent variable) in this experiment?

Answers

Answer:

Moisture

Explanation:

The independent variable, in this case, would be the moisture levels of the soils.

The independent variable is the variable being tested. It is the only variable that is altered in the course of an experiment and which has a direct effect on the actual variable that is the main aim of the experiment. All other variables are kept constant while the independent variable is manipulated.

The tomato plants in the two groups were under the same conditions except that a group had more moisture in the soil. Hence, the independent variable is the moisture.

In the real world could the roller coaster car reach the top of the second hill if the second hill were as high as the firsts hill

Answers

In the real world where some energy is transferred to the environment as heat and sound the rollercoaster will not reach the top of a second hill if identical height.

Answer: No, it couldn’t. Energy leaves the system in the form of heat as the roller coaster cars travel from the top of one hill to the next. The vehicles have less total energy, so the potential energy at the top of the second hill must also be less. The cars wouldn’t be able to achieve the height of the first hill.

Explanation: Make sure to change some of it because it's from Edmentum!!

Which is inversely proportional to your weight on a planet's surface?
A. Only your mass
B. Your mass and the mass of the planet
O O O
C. Only the planet's mass
D. The distance from the surface to the center of the planet

Answers

Answer:

most likely D

Explanation:

Distance from the surface to the center of the planet is inversely proportional to your weight or force due to gravity on a planet's surface.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The gravitational constant, denoted by the capital letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity.

f = Gmm/r²

Distance from the surface to the center of the planet is inversely proportional to your weight or force due to gravity on a planet's surface.

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A train rolls at a constant speed of 10 m/s across a horizontal track. A child standing on the flatbed of the train throws a ball so that it appears to move straight up to an observer standing next to the track. a. What is the horizontal speed of the ball relative to the observer?

Answers

Answer:

The answer is 10m/s

Explanation:

Given that the child is in the train, and that the train is moving at a speed of 10m/s, and also the child is standing on the flatbed, hence the child is not moving, therefore the velocity of the child is 10m/s relative to the observer

Also, when the child throws the ball horizontally relative to the observer the horizontal speed is also 10m/s.

therefore the speed of the ball is also 10m/s to the observer

Define what velocity means.

Answers

Answer:

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).

On the Moon, astronauts can “bounce” from location to location, but on Earth they cannot move in this way. What physical property changes based on the gravitational force of a planet or moon?

Answers

The physical property that changes is the astronauts “weight” because of the different gravitational force of the moon.

When a Newton's Cradle with three marbles is pulled back and released, a collision happens between the marbles causing a cycle of repeated motion. This transfer of energy will last for several cycles. List out all of the energy transfers that occur in one cycle.

Answers

Answer:

Please find the answer in the explanation

Explanation:

When a Newton's Cradle with three marbles is pulled back and released, the mechanical energy is converted to potential elastic energy.

When a collision happens between the marbles causing a cycle of repeated motion, The elastic potential energy is converted to kinetic energy.

This transfer of energy will last for several cycles. If there is any energy lost, then the kinetic energy must have been converted to thermal energy or heat energy

A piece of metal has a density of 11.3 g/cm and a volume of
6.7 cm3. What is the mass of this piece of metal?

Answers

Answer:75.71g≈75.7

Explanation:Mass = Density ⋅ Volume = 11.3 ⋅ 6.7 = 75.71g

If all objects that have mass also have gravity, why doesn't your pencil get pulled towards you while it sits on your desk?

Answers

Answer:

The pencil is not pulled towards a person due to a very small magnitude of force between them, due to lighter masses.

Explanation:

Let us apply Newton's Law of Gravitation between a person and pencil.

Average Mass of a Normal Pencil = m₁ = 10 g = 0.01 kg

Average Mass of a Person = m₂ = 80 kg

Distance between both = r = 1 cm = 0.01 m (Taking minimal distance)

Gravitational Constant = G = 6.67 x 10⁻¹¹ N.m²/kg²

So,

F = Gm₁m₂/r²

F = (6.67 x 10⁻¹¹ N.m²/kg²)(0.01 kg)(80 kg)/(0.01 m)²

F = 5.34 x 10⁻⁷ N

This Force is very small in magnitude due to the light masses of both objects.

Therefore, the pencil is not pulled towards a person due to a very small magnitude of force between them, due to lighter masses.

The town of Seaside needs to build a new power plant. The old coal burning plant produces too much pollution and is no longer safe. The mayor decides that he will do some research on alternative forms of energy like nuclear power plants and solar power plants.

What types of resources should the mayor use to conduct his research? Why would these be considered reliable sources of information and why? What types of resources are reliable? How can he use what he learns to make the best decision for the town?

Answers

The mayor is making a good decision to do research into renewable forms of energy. Not only does coal produce pollution, it also contributes to greenhouse gas emissions. Plus, the supply of coal is a finite source. It is considered a natural resource instead of renewable. That means that eventually the supply of coal will run out at some point. Renewables do not encounter such a problem.

So it's smart to look into alternative forms of energy such as nuclear or solar. The benefit of nuclear is that it produces a lot of energy and does so efficiently. The downside is that it's that accidents would lead to disastrous outcomes (eg: the nuclear disaster in Japan). Also, there's the issue of what to do with the nuclear waste. The waste itself is very dangerous and it must be buried underground sealed in thick containers. This is an expensive operation. The rate of decay of the material takes a long time, which means that future generations hundreds of years down the line will have to deal with the waste.

Solar is a cleaner alternative to nuclear, but unfortunately it is not as efficient compared to nuclear power. You need a lot of solar panels in a vast open area to be able to get the energy to power many homes. Places out in the desert are a good choice to put the solar farms because the sun shines intensely there and not many people (or no people) live out in remote areas such as that one.

Because the town is called Seaside, it seems like this town is on the coast. If so, then the mayor should look into wind power to complement solar power. Wind along the coast is often very intense due to the sea current and jet stream. The downside to wind power is that some days the wind doesn't blow at all. The mayor could also look into tidal power which harnesses the flow of the tides coming in and out. If a major river is nearby (that flows into the ocean) then s/he could consider hydroelectric power as well. There are many renewable options to pick from. Each option has its pros and cons, so it's up to the mayor to weigh what exactly their needs are and how efficiently they want electricity. Mixing various options is possibly the best idea since you get a bit of each pro/con from all the options mentioned.

Find the acceleration of a car with a mass of 1,200kg and a force of 11,000N

Answers

Answer:

42000N

Explanation:

.........................

Acceleration =9.166 m/s^2
Explanation: F=ma so you rearrange the formula. A=F/M

An object is moving east with a constant speed of 30 m/s for 5 seconds. What is the object’s acceleration?

Answers

Answer:

6 m/s²

Explanation:

From the question given above, the following data were obtained:

Velocity (v) = 30 m/s

Time (t) = 5 s

Acceleration (a) =..?

Acceleration is defined mathematically as:

Acceleration (a) = Velocity (v) /time (t)

a = v /t

With the above formula, we can obtain the acceleration of the object as follow:

Velocity (v) = 30 m/s

Time (t) = 5 s

Acceleration (a) =..?

a= v/t

a= 30/5

a = 6 m/s²

Therefore, the acceleration of the object is 6 m/s² due East.

Max and Jimmy want to jump on a trampoline. Max begins jumping in a steady pattern, making small waves in the trampoline. Jimmy starts jumping on the trampoline too. Suddenly, Max goes twice as high even though he did not put any extra effort into jumping. What type of wave interaction is this?

Answers

Answer:

x_total = (A + B) cos (wt + Ф)

we have the sum of the two waves in a phase movement

Explanation:

In this case we can see that the first boy Max when he enters the trampoline and jumps creates a harmonic movement, with a given frequency. When the second boy Jimmy enters the trampoline and begins to jump he also creates a harmonic movement. If the frequency of the two movements is the same and they are in phase we have a resonant process, where the amplitude of the movement increases significantly.

         Max

               x₁ = A cos (wt + Ф)

         Jimmy

              x₂ = B cos (wt + Ф)

         

total movement

             x_total = (A + B) cos (wt + Ф)

 Therefore we have the sum of the two waves in a phase movement

Answer:

In this case we can see that the first boy Max when he enters the trampoline and jumps creates a harmonic movement, with a given frequency. When the second boy Jimmy enters the trampoline and begins to jump he also creates a harmonic movement. If the frequency of the two movements is the same and they are in phase we have a resonant process, where the amplitude of the movement increases significantly.

Explanation:


What are the 8 types of energy? SOMEONE PLEASE PLEASE HELP

Answers

thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy

The eight types of energy are Kinetic Energy, Potential Energy, Thermal Energy, Chemical Energy, Electrical Energy, Radiant Energy, Nuclear Energy, and Sound Energy.

The eight types of energy are:

Kinetic Energy: The energy possessed by an object due to its motion.

Potential Energy: The energy stored in an object based on its position or condition.

Thermal Energy: The energy associated with the motion of particles in a substance. It is related to temperature.

Chemical Energy: The energy stored in the bonds of chemical compounds.

Electrical Energy: The energy associated with the movement of electric charges.

Radiant Energy: The energy carried by electromagnetic waves, such as light or radio waves.

Nuclear Energy: The energy released or absorbed during nuclear reactions or radioactive decay.

Sound Energy: The energy produced by the vibration of objects and transmitted through a medium as sound waves.

These are the commonly recognized types of energy. It's important to note that energy can often be converted from one form to another.

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How do I shift reality?

Answers

Answer:

i think you should probably join shifting aminos/discord servers. i would tell you how but it wont fit here :((

Explanation:

Answer:

Shimmey shay on yt

Explanation:

21000 km/hr how far will it travel in 5 hours

Answers

Answer:

105000 is the answer your welcome

Explanation:

105000

pts
You walk 10 meters east, then 5 meters north. What is your displacement?

Answers

Displacement = square root ( 100+25 ) = .... m

The angle East of North is = inv tan ( 5/10 )

Use the drop-down menu to identify the state of matter represented by each imagine.
A.
B.
C.
D.

Answers

Answer:

a: gas

b: solid

c: liquid

d: plasma

Explanation:

Answer:

Each image displays a different state of matter.

Use the drop-down menu to identify the state of matter represented by each image.

A:

✔ gas

B:

✔ solid

C:

✔ liquid

D:

✔ plasma

Explanation:

got it right

what would a boats velocity be if it would go 15kph and 18 kph?

Answers

Answer:

It depends

Explanation:

field lines point out from all sides on a object. Some of the lines point into a second object nearby. Which statement best describes the objects? A. both objects are permanent magnets B. both objects are electromagnets C. the first object is negatively charged, and the second object is positively charged D. the first object is positively charged, and the second object is negatively charged

Answers

Answer:

The first object is positively charged, and the second object is negatively charged. (D)

Explanation:

Plz I need the answer quick!!!
What is the definition of law of conservation of energy

Answers

Answer:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.

Explanation:

Hope this helps!

Answer:

means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

Explanation: this is a shorter answer.

Two ropes are attached a wagon one horizontal to the west with a tension force of 75N and other east and at an angle of 38 degrees upward from horizontal with a lension force of 125 N Find the components of the net force on the cart Show your work

Answers

Answer:

The components of the net force acting on the cart are;

Horizontal force, Fₓ ≈ 23.5 N acting east

The vertical force, [tex]F_y[/tex] ≈ 76.96 N

Explanation:

The parameters given in the question are;

The magnitude of the force on the rope acting horizontally to the west = 75 N

The magnitude of the force on the other rope east acting at an angle to the horizontal = 125 N

The angle to the horizontal of the force on the other rope east to the horizontal = 38°

Therefore, we have;

The horizontal component of the force acting east = 125 × cos(38°) ≈ 98.5 N

The net sum of the horizontal forces, ∑Fₓ noting that the horizontal forces are acting in opposite direction is given as follows;

∑Fₓ = 75 - 125 × cos(38°) = 75 - 98.3 = -23.5N

Given that the difference in forces is negative, and hat we took the force acting east as negative, we have that the net horizontal force is acting east with a horizontal component of 23.5N

The net vertical force, ∑F[tex]_y[/tex], is given as follows;

∑F[tex]_y[/tex] = 125 × sin(38°) ≈ 76.96 N

Therefore, the components of the net force acting on the cart are;

Horizontal force, Fₓ ≈ 23.5 N, the vertical force, [tex]F_y[/tex] ≈ 76.96 N

The components of the net force on the cart are 23.5 Newton and 76.96 Newton.

Given the following data:

Tension force (horizontal) due west = 75 NTension force (horizontal) due east = 125 NAngle of inclination = 38°

To find the components of the net force on the cart:

First of all, we would determine the horizontal component of the force acting due east.

[tex]F_y = Fcos(\theta)\\\\F_y = 125cos(38)\\\\F_y = 125 \times 0.7880\\\\F_y = 98.5 \; Newton[/tex]

Next, we would find the resultant horizontal forces:

[tex]\sum F_y = F + F_y\\\\\sum F_y = 75 + (- 98.5)\\\\\sum F_y = -23.5 \;Newton[/tex]

Therefore, the horizontal component of the net force acts in the opposite direction due east.

Horizontal component of the net force = 23.5 Newton

For the vertical component of the net force:

[tex]\sum F_x = Fsin(\theta)\\\\\sum F_x = 125cos(38)\\\\ \sum F_x = 125 \times 0.6157\\\\ \sum F_x = 76.96\; Newton[/tex]

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Why does sonar use ultrasound rather than sound?

Answers

Answer;  Ultrasonic waves (sounds having frequency greater than 20,000 Hz) are used in sonar because: ... Ultrasonic waves can penetrate water to long distances (because of their high frequency and very short wavelength), but ordinary sound waves or infrasonic waves cannot penetrate water to such long distances.

Answer:

Ultrasonic waves (sounds having frequency greater than 20,000 Hz) are used in sonar because: ... Ultrasonic waves can penetrate water to long distances (because of their high frequency and very short wavelength), but ordinary sound waves or infrasonic waves cannot penetrate water to such long distances

Explanation:

How do electromagnetic waves affect you?

Answers

Answer:

At low frequencies, external electric and magnetic fields induce small circulating currents within the body. ... The main effect of radiofrequency electromagnetic fields is heating of body tissues. There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health.

That
Vhy do people engage in various
e long answer to the following questions.
Which tradition of our society needs to be reform
and write the ways to reform them
of Nepal​

Answers

Hey can you please help me?

Which of the following is NOT a vector?
A. Force
B. Acceleration
C. Mass
D. Displacement

Answers

Answer:

Explanation:

Mass is the only one of these that is not vector; everything else has both magnitude and direction.

A group of tourists drives through a state park in Maine. While arguing about whether the animal they've just seen is an Elk or a Moose, a chipmunk darts across the park road. The driver, who was traveling 6.7 m/s through the park slams on their breaks and comes to a stop. If the car has an acceleration of -8.3 m/s2, how long does it take the car to stop?

Answers

Answer:

0.8 second

Explanation:

Given data

Speed v=6.7m/s

Deceleration = - 8.3m/s²

Initial velocity u= 0m/s

We can solve for the distance covered upon breaking the speed using the expression

v=u +at

6.7=0-(8.3)t

6.7=8.3t

Divide both sides by 8.3

6.7/8.3=t

t=6.7/8.3

t=0.8 second

How are velocity, wavelength, and frequency related

Answers

Answer:

The wave velocity and the wavelength are related to the wave's frequency and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of waves per unit time is the frequency ƒ. The wave frequency and the period are inversely related to one another.

Explanation:

Other Questions
The rectangle below has an area of 8x^5+12x^3+20x^28x 5 +12x 3 +20x 2 8, x, start superscript, 5, end superscript, plus, 12, x, cubed, plus, 20, x, squared. The width of the rectangle is equal to the greatest common monomial factor of 8x^58x 5 8, x, start superscript, 5, end superscript, 12x^312x 3 12, x, cubed, and 20x^220x 2 20, x, squared. Estimate the total mass of ocean on earth What is the most effective way to combine sentences 6 and 7?A. Background noises and sound effects cannot be adequately recorded duringfilming these, including such things as roaring cars, galloping horses, or thegentle tapping of pencils on desks.B. Background noises and sound effects cannot be adequately recorded duringfilming when they include such things as roaring cars, galloping horses, orthe gentle tapping of pencils on desks.C. Background noises and sound effects, such as roaring cars, gallopinghorses, or the gentle tapping of pencils on desks, cannot be adequatelyrecorded during filming.D. Background noises and sound effects cannot be adequately recordedbecause such things as these roaring cars, galloping horses, or the gentletapping of pencils on desks are included during filming.(6) Background noises and sound effects cannot be adequatelyrecorded during filming. (7) These include such things as roaring cars, gallopinghorses, or the gentle tapping of pencils on desks. ZA and ZB are complementary angles. If mZA = (7x + 23) andmZB = (5x + 19), then find the measure of ZB. SKIP TO MAIN NAVIGATIONSKIP TO MAIN CONTENTSKIP TO FOOTERCommonLit LogoCOMMONLITASSIGNMENT IN PROGRESS FOR 343 (HOMEROOM): PERIOD 1+2DUE OCTOBER 15, 2020DON'T HATE ON THE TRAITby BirdBrain Science2016FONT SIZEAAAAEver wonder why people all look and act differently? This informational text explains that peoples traits, like their different appearances and personalities, develop mainly from two sources: their parents' genes and the environment. As you read, identify the different ways how genes and environment can affect peoples traits.Think about the building where you live. If its a house or an apartment building, its made up of water pipes, a roof, different rooms, and thousands of wooden boards. On your street there are probably many different buildings and each building is very, very complicated. For people to be able to live inside, all the thousands of different parts have to work and fit together. To build something with so many parts, architects1 have to draw every single part. They need to think about every electrical plug, toilet, and wall. The architects then give their drawings to people who build the house. These drawings are the instructions that show them what to build. Since there are so many different parts to put together, every building needs its own instructions.Just like buildings, all people are built differently too. For instance, the people in your class might all have different colors of eyes, hair, and skin. People can change what they look like somewhat by cutting their hair or wearing different clothes. You can decide what some parts of you look like on the outside, but you cant decide how you are built. The parts of you that you cannot change are in your genes. Genes are the instructions for your body and they are inside of every one of your cells.2 They are found in every other living thing on earth too, and are the instructions for how to make each of those things. Your genes tell your cells what to do. They tell your body how to grow, make you look a certain way, and even decide what your personality will be like.Genes give you characteristics3 that can make you look the same as other people or very different from them. Your genes might give you brown eyes, black hair, and make you 5 feet 4 inches tall. All other living things also have characteristics that came from their genes. A palm tree might be tall, brown, skinny, and have green leaves at the top. Each of those is a characteristic of that palm tree. Another name for a characteristic that we use in science is trait. A trait is any part of a living thing that was determined by its genes, by its environment, or by both.There are three different reasons why the person and the palm tree are the way they are:5.How does the texts explanation of variation contribute to the central idea? In a square what is the relationship between the length and the side of the area? Please help me!!!!!i need it in 10 minutes Which is the first prime minister of the world? Find an expression which represents the difference when (10x-6y)(10x6y) is subtracted from (7x-4y) in simplest terms. Use the order of operations to simplify the following expression.11 - 3 2.4 + 58.81.224.259.2 3. Use the equation y = 3.2x + 5to complete in the table.Type the answers in the boxes below.1243. Is y proportional to x and y?Select the correct choice from the drop down.Explain why or why not.Type your response in the space below. Which event was sensationalized by the sons of liberty that increased tension between the colonists and the British troops In 1884, the United States established time zones. What new form of transportation was the reason for this?A. AutomobileB. TrainC. BoatsD. Airplanes What is the slope of a line that passes through points (2, 4) and (8, 22)??????? Research has shown that biological factors do not contribute to alcohol abuse. True or false? Provide an explanation so i know you aren't guessing. A student wants to know which part of his local beach contains the most turtle nests during nesting season. He researches turtle nesting, makes a prediction to investigate based on his research and observations, and plans his experiment. He performs the experiment, and once his experiment is completed, he writes down his data and ends his study. What part of the scientific method is he missing from this investigation? . Calculate the cost of the raw material (Gilden) purchases by month and in total, for the third quarter. On January 1, 20X8, L Corporation acquired all of the common stock of S Company for $300,000. On that date, S Company's identifiable net assets had a fair value of $250,000. The assets acquired in the purchase of S are considered to be a separate reporting unit of L Corporation. The carrying value of S Company's net assets at December 31, 20X8, is $310,000. The fair value of the reporting unit is determined to be 260,000. Determine the amount, if any, of impairment loss to be recognized at December 31, 20X8. a. 40,000 b. 50,000 c. 10,000 d. 60,000 PLEASE ANSWER QUICKLY: (FIRST ANSWER GETS BRAINLIEST)When comparing financial institutions, price is an important factor. What is TRUE about prices in financial institutions?A. Interest rates on CD accounts are lower than on other types of accounts.B. 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