Because the mass is constant, if the velocity is increased, the kinetic energy must also increase.
Carsten is walking down the street while maintaining a constant velocity of 5.0 m/s west. At time t = 0.0 s, Carsten is 250 m west of point A. What is his displacement from the starting position at 60.0 s? *
Answer Format: # units direction
Answer:
550 meters west
Explanation:
Givens: Inital velocity/vi= 5.0m/s, time/t=60.0s, acceleration/a= 0 because a constant velocity means 0 acceleration, inital position/xi=250m
Unknown: final position/xf=?
Formula: xf=xi+vi(t)+1/2at^2
xf=250m+5.0m/s(60.0s)+1/2(0)(60.0s)^2
xf=250m+300m
xf=550m west
its still west because he never chhanged direction therefore his postion kept increasing.
During an experiment, you take a measurement of 12.9 inches.
What is this
measurement in centimeters?
A. 5.08 cm
B. 32.8 cm
C. 45.1 cm
D. 16.2 cm
Answer:
1 inch = 2.54 cm
12.9 inches= 12.9 x 2.54
= 32.766
= 32.8 cm (approximately)
Hope it helps...
Answer:
B) I just solved it
Explanation:
Does the mass of an object dictate the acceleration of
a falling object
Answer:
No.
Explanation:
Because the acceleration of falling objects is constant and is not affected by mass
Answer: no
The acceleration of an object is equivalent to the gravitational acceleration. The size, shape, and weight of an item are not a cause in the motion of the object. So all objects, regardless of its mass, size, or shape fall freely with the same acceleration.
A car is traveling at a speed of 54 km/h. Breaks are applied so as to produce a uniform acceleration of -0.5 m/s2. Find how far the car will go before it is brought to rest
Explanation:
u=54 km/h
54*5/18=15 m/s
v=0m/s
t=?
acceleration=-0.5m/s^2
we know that a=v-u/t
so,
t=v-u/a
t=15-0/0.5
=15/0.5
=30
therefore, the time is 30 second
Hope this answer helps you..
mechanical advantage of a second class lever is always greater than one why? give reason
Answer:
It is because the load is in between fulcrum and effort making a longer effort arm than the load arm resulting to multiplication of force and a mechanical advantage of greater than 1.
Explanation:
The distance from the fulcrum to the effort is the effort arm where as the distance from the fulcrum to the load is the load arm.
The first class lever has a mechanical advantage that varies per the position of the load with respect to effort position from the fulcrum. They have the fulcrum at the middle. For example, a beam balance and a pliers. The formula to remember is FLE for easy categorization of the lever classes.
The second class lever , the load is at the middle.For example a wheel barrow and a bottle opener. In this class, the effort arm is longer than the load arm.The effort is force multiplication making the mechanical advantage to be greater than 1.
The third class of lever has effort in the middle.For example a spade or a knife.In this class effort arm is shorter than the load arm, causing change in direction of force. The effect is a mechanical advantage less than 1.
a boat is moving 1.3m/s N while the steam current is pushing the boat 2.2m/s What is the resultant velocity( I also need the givens,and the formula as well as the answer please and thank youuu)
Answer:
6) 2.6 m/s, 31°
7) 9.2 m/s
8) 1.2 s
Explanation:
I'll do #6, #7, and #8 as examples. You can solve #9 using the equation from #7, and #10 using the equation from #8.
6) Take north to be +y and east to be +x.
Given:
vₓ = 2.2 m/s
vᵧ = 1.3 m/s
Find: v
v² = vₓ² + vᵧ²
v² = (2.2 m/s)² + (1.3 m/s)²
v ≈ 2.6 m/s
θ = atan(vᵧ / vₓ)
θ = atan(1.3 / 2.2)
θ ≈ 31°
7) Given:
Δy = -4.3 m
v₀ = 0 m/s
a = -9.8 m/s²
Find: v
v² = v₀² + 2aΔy
v² = (0 m/s)² + 2 (-9.8 m/s²) (-4.3 m)
v ≈ 9.2 m/s
8) Given:
Δy = -6.7 m
v₀ = 0 m/s
a = -9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
-6.7 m = (0 m/s) t + ½ (-9.8 m/s²) t²
t = 1.2 s
I wave is a disturbance in matter that transfers energy through the matter.
Answer:
ok is this a question? if so i can edit my answer
Explanation:
when did the universe become visible
What is meant by the term "fixed point"?
Explanation:
A fixed point is a point x such that. f(x) = x . Graphically, these are exactly those points where the graph of f, whose equation.
Answer:
a fix joint is a point x such that.f (x) = x.
Explanation:
Graphically, these are execty those point where the graph of f, whose equation.
Need help on this question??please
If I traveled 30 miles in 1 hour, then 20 miles in 1 hour, and 50 miles in 3
hours, what is my average speed?
Answer:
The answer is 20 miles/hr
Explanation:
what are three effect of force
Answer:
1. Can change the state of an object(rest to motion/ motion to rest)
2. May change the speed of an object if it is already moving.
3. May change the direction of motion of an object.
Explanation: A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate.
How might you demonstrate respect for your instructors or a fellow students
Answer:
Being attentive is the best way to demonstrate respect.
Explanation:
What black hole is the most recent throughout the infinitive solar galaxy? 50 points!!! The first person to answer will be the Brainliest.
Answer:
Judging from the number of stars large enough to produce such black holes, however, scientists estimate that there are as many as ten million to a billion such black holes in the Milky Way alone.
Explanation:
the Image shows a portion of the periodic table. which two elements have similar characteristics?
a.
neon and fluorine
b.
chlorine and sulfur
c.
fluorine and chlorine
d.
oxygen and chlorine
e.
argon and fluorine
this is science but I for some reason the science wasnt showing
Answer:
Option C) Fluorine and Chlorine.
Explanation:
According to the given options; the two elements that have similar characteristics are Fluorine and Chlorine.
As both the elements belong to the same group in the periodic table which is the halogen group and they have the same valency although their reactivities differ. Fluorine is more reactive than chlorine if compared. They both are placed in the same group which is Group 7 in the modern periodic table. As both the elements have 7 electrons in their outermost shell.
A roundabout in a fairground requires an input power of 2.5 kW when operating at a constant angular velocity of 0.47 rad s–1 . (a) Show that the frictional torque in the system is about 5 kN m. (3) 1. (b) When the power is switched off, the roundabout decelerates uniformly because the
Answer:
Explanation:
Since the roundabout is rotating with uniform velocity ,
input power = frictional power
frictional power = 2.5 kW
frictional torque x angular velocity = 2.5 kW
frictional torque x .47 = 2.5 kW
frictional torque = 2.5 / .47 kN .m
= 5.32 kN . m
= 5 kN.m
b )
When power is switched off , it will decelerate because of frictional torque .
Why is electricity created at peak times not as efficient?
Explanation:
electricity created at peak........
Use the information from the graph to answer the question. What is the acceleration of the object?
m/s2
The acceleration of the object is determined as -2.5 m/s².
What is acceleration?Acceleration is the rate of change of velocity with time.
Mathematically, acceleration is given as;
a = Δv/Δt
a = (v₂ - v₁)/(t₂ - t₁)
where;
v₂ is the final velocityv₁ is the initial velocityt₂ is the final timet₁ is the initial timeFrom the graph;
the initial velocity = 40 m/s
the final velocity = 10 m/s
the final time = 12 seconds
the initial time = 0 second
acceleration = (10 - 40) / (12 - 0)
acceleration = -30/12
acceleration = -2.5 m/s²
Thus, the acceleration of the object is determined as -2.5 m/s².
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a sydiver jumps out of a plane. She fall dowward at a very fast speed. Which force is acting upon it?
Answer:
There will be two forces acting on her: Gravitational force and Air resisitence
Susie estimated that she can run for hours at a steady speed of 8m/h. She enters a
marathon, a distance of 26meters. How long should it take her to complete the race?
Time = (distance) / (speed)
Time = (26 meters) / (8 meters/hour)
Time = 3.25 hours or 3 hours 15 minutes
What is the acceleration of a 50kg object pushed with a force of 500 newtons?
Answer:
10
Explanation:
Acceleration = Force / Mass
500 N / 50 Kg = 10
Which property of air makes it effective in protecting firefighters?
The property of air which makes it effective in protecting firefighters is that it is a poor thermal conductor.
What is air?We define air as a mixture of gasses. We know that there a re several gases that are known to compose air and among these are oxygen, carbon dioxide, noble gasses and nitrogen.
We know that air is a poor conductor of heat. As such, air does not heat up quite easily and this would help to protect the fireman from getting burnt since air does not easily allow heat to pass through it as it were, this is why the firefighters depend on the insulative property of air.
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PLESSE HELP ASAP :))))
Two weeks ago, a new moon occurred. If
someone looked at the night sky tonight, what could they expect to see?
Answer:
Full moon would be seen.
Explanation:
The moon is the natural planet of the earth, which orbits the earth and thus the Sun. It takes 29.5 days for a complete revolution, passing from one phase to another in the process.
Whenever a new moon is observed, it would take 14 days i.e 2 weeks before it turns to a full moon. Thus with respect to the given question, a full moon would be seen.
a 25 kg object is pushed with a horizontal force of 5 N esat across a table. If the force of friction is 2 N, what is the acceleration of the object?
Answer:
Apply Newton's second law in the moving direction.
Explanation:
[tex]\begin{aligned}F &= ma\\5N-2N &= 25kg\times a\\a & = \frac{3N}{25kg}\\&= 0.12ms^{-2}\end{aligned}[/tex]
Friction force applies in the opposite direction of motion; as a restriction.
Plz Help 100 points
Cool air moves from an air conditioning unit to the rest of a room in a process called ____________.
Explanation:
Ventilation
people with____ need to check there blood sugar level on a regular basis
Answer:
diabetes
Explanation:
hope it helps
Answer:diabetes
Explanation:
common sense
A particle (charge = 40 μC) moves directly toward a second particle (charge = 80 μC) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped.
Answer:
The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m
Explanation:
Given that,
First charge = 40 μC
Second charge = 80 μC
Distance between the two particles = 2.0 m
Kinetic energy = 16 J
We need to calculate the distance separating the two particles when the moving particle is momentarily stopped
Using conservation of energy
[tex]K.E+\dfrac{kq_{1}q_{2}}{d}=\dfrac{kq_{1}q_{2}}{x}+K.E[/tex]
Put the value into the formula
[tex]16+\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{2}=\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{x}+0[/tex]
[tex]16+14.4=\dfrac{28.8}{x}[/tex]
[tex]30.4x=28.8[/tex]
[tex]x=\dfrac{28.8}{30.4}[/tex]
[tex]x=0.947\ m[/tex]
Hence, The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m
The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.
The given parameters;
charge of the first particle, q₁ = 40 μCcharge of the second particle, q₂ = 80 μCinitial distance between the particles, x₁ = 2 minitial kinetic energy, K.E₁ = 16 JThe kinetic energy is zero at the instant the moving particle is momentarily stopped.
The distance separating the two particles when the moving particle is momentarily stopped is calculated as follows;
[tex]K.E_1 \ + W_1 = K.E_2 + W_2\\\\K.E_1 + \frac{kq_1q_2}{x_1} = K.E_2 + \frac{kq_1q_2}{x_2} \\\\16 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{2} = 0 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{x_2} \\\\30.4= \frac{28.8}{x_2} \\\\x_2 = \frac{28.8}{30.4} \\\\x_2 = 0.947 \ m[/tex]
Thus, the distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.
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What is the height where a 110.8 kg woman would have a gravitational potential energy of 8741 J?
Answer:
8.042m
Explanation:
Ep = mgh
given that ,
m = 110.8kg
h =?
g = 9.81 m/s^2
Ep= 8741J
8741= 110.8 × 9.81 × h
h= 8741 ÷ ( 110.8 × 9.81 )
h = 8.042m
Sally and Misha pushed a cart toward the right with a force of 24 N each. If Jeff pushed on the cart in the opposite direction, how much force would he need to use to cause the cart to experience balanced forces? (Answer with a number)
Answer:
F = 48 [N]
Explanation:
To solve this problem we must use Newton's third law, which tells us that the sum of forces on a body must be equal to zero, that is, the body is in static equilibrium or in equilibrium.
ΣF = 0
24 + 24 - F = 0
F = 24 + 24
F = 48 [N]
Note: Jeff's force should be equal to the sum of Sally and Misha's forces, but in the opposite direction.