A 52 N sled is pulled across a cement sidewalk at constant speed. A horizontal force of 36 N is exerted. What is the coefficient of sliding friction between the sidewalk and the metal runners of the sled?

Answer:

Explanation:

The work done by an object can be found by using the formula

From the question

force = 400 N

distance = 50 m

We have

work done = 400 × 50

We have the final answer as

Hope this helps you

Answer:

MA of a lever is 2. It means the lever can lift a load of 2 times heavier than the effort

Answer:

The horizontal speed is constant because no forces act horizontally.

There is  constant vertical acceleration  (g = 9.8 m/s^2) due to the force of gravity.

Answer:

473.28m/s^2

Explanation:

ac=4×9.86×75m/ 6.25 =2958m÷6.25=473.28 m/s^2<exponent

i hope this help

dont blame me if im wrong

im only 13 but :) tell me if im wong or not hehe after u know the answer

someone teach me this

Answer:

I hope this helps

Explanation:

homogeneous mixture

Answer:Kinetic energy

Explanation:

Answer:

Explanation:

The work done by an object can be found by using the formula

From the question

force = 15 N

distance = 3 meters

We have

work done = 15 × 3

We have the final answer as

Hope this helps you

Answer:its velocity changes

Explanation:

Answer:

She is running 5 yards a second Or 300 yards a minute

Explanation:

Divide 200 by 40 to get the rate of speed in seconds

Answer:

≈ 10.23mph

Explanation:

1760yrds in 1 mile

200yrds to miles is:

200/1760 = .1136miles

3600sec in 1 hr

40sec to hours is:

40/3600 = .011111hrs

Now we find her speed in miles per hour:

.1136mi/.01111hrs ≈ 10.23mph

Answer:

its option c the age of a fossil can be determined

Answer:

7,200 j

Explanation:

:) :)) :)) :) :)))

Answer:

c. 7,200 J

Explanation:

did the quiz <3

Answer:

The acceleration of the motorbike as it came to a stop was -8.78 m/s² (NOTE: Negative sign indicates deceleration)  

Explanation:

From the question,

A motorbike is traveling to the left with a speed of 27.0 m/s.

This is the initial speed, that is, initial speed = 27.0 m/s

Also, from the question,

The rider slams on the brakes and the bike skids 41.5 m, that is, the bike covers a distance of 41.5 m after the rider slams on the brakes.

Distance = 41.5 m

To determine the acceleration of the motorbike as it came to a stop,

Since, the bike came to a stop, then, the final speed is 0 m/s

From one of the equations of motion for linear motion

v² = u² + 2as

Where v is the final speed (velocity)

u is the initial speed (velocity)

a is the acceleration

and s is the distance

From the question

v = 0 m/s

u = 27.0 m/s

s = 41.5 m

Putting these into the equation

v² = u² + 2as

0² = 27.0² + (2×a×41.5)

0 = 729.0 + 83a

83a = -729.0

a = -729.0 / 83

a = -8.78 m/s² (NOTE: Negative sign indicates deceleration)  

Answer:

8.8 m/s^2

Explanation:

Khan Academy answer

Answer:

T=35,000J/5000W=7s

Answer:

W'=125.44 N

Explanation:

The weight of a person on the surface of Earth is 784 N

Weight is given by :

W = mg

m is mass of the person and g is acceleration due to gravity on the surface of Earth (10 m/s²)

[tex]m=\dfrac{W}{g}\\\\m=\dfrac{784}{10}\\\\m=78.4\ kg[/tex]

The acceleration due to gravity on the surface of Moon, g' = 1.6 m/s²

Weight of the person on the moon is :

W'=mg'

[tex]W'=78.4\ kg\times 1.6\ m/s^2\\\\W'=125.44\ N[/tex]

Hence, the person would weigh 125.44 N on the Moon.

Answer:

129 N

Explanation:

The answer you're looking for is 129 N

Weight on Earth, divide by Earth's gravity (≈9.80), multiplied by the gravity of the Moon (≈1.60).

Answer:B

Explanation:

Answer:

from plato

Explanation:

In the below diagram of water, H refers to the hydrogen atom and O is the oxygen atom.

For the formation of one water molecule, two hydrogen atoms combine or react with one oxygen atom. They make covalent bonds with each other means mutual sharing of electrons. In the formation of water molecules, the energy is released which tells us that exothermic reaction taking place. In the diagram we can see that first the line is higher but when the reaction is completed the line comes lower which shows that energy is released.

Learn more: https://brainly.com/question/18296054

Answer:

I’m so sorry I tried solving it but I don’t understand it can you explain the question a little bit more ty

Explanation:

Answer:

Asexual production they can be eukaryotes or prokaryotes

Explanation:

Mass of two bumper cars, m₁ = m₂ = 125 kg

Initial speed of car X is, u₁ = 10 m/s

Initial speed of car Z is, u₂ = -12 m/s

Final speed of car Z, v₂ = 10 m/s

We need to find the final speed of car X after the collision. Let v₁ is its final speed. Using the conservation of momentum to find it as follows :

[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2[/tex]

v₁ is the final speed of car X.

[tex]m_1u_1+m_2u_2-m_1v_1=m_2v_2\\\\m_2v_2=m_1u_1+m_2u_2-m_2v_2\\\\m_1v_1=125\times 10+125\times (-12)-125\times 10\\\\v_1=\dfrac{-1500}{125}\\\\v_1=-12\ m/s[/tex]

So, car X will move with a velocity of -12 m/s.

Answer:

solution

distance travelled : 500km

time taken:4 hour

speed:?

now

speed: distance travelled ÷ time taken

or, 500 ÷ 4

therefor,speed :125km/h

Answer:

2.61 [tex]\frac{m}{s}[/tex]

Explanation:

v= d/t

v = 6m/2.3 s

v=2.61 [tex]\frac{m}{s}[/tex]

Answer:

[tex]\boxed {\tt v\approx2.61 \ m/s}[/tex]

Explanation:

Velocity can be found by dividing the displacement by the time.

[tex]v=\frac{d}{t}[/tex]

The displacement is 6 meters and the time is 2.3 seconds.

[tex]d= 6 \ m\\t= 2.3 \ s[/tex]

Substitute the values into the formula.

[tex]v=\frac{6 \ m}{2.3 \ s}[/tex]

Divide.

[tex]v=2.60869565 \ m/s[/tex]

Let's round to the nearest hundredth. The 8 in the thousandth place tells us to round the 0 to a 1.

[tex]v\approx2.61 \ m/s[/tex]

The velocity of the marble is about 2.61 meters per second.

Answer:(B) 25.0 N

Explanation:

This is what makes most since. You are wanting to look at the stress of the first wire. 25 *3 for the amount of balls handing of the string you get 75.0 N which is the max the top wire can hold without breaking! Hope this helps!

Answer:

40M/S

Explanation:

BY CALCULATION USING THE FORMULA S=FD

Answer:

I = 1.4 [amp]

Explanation:

To solve this problem we must use ohm's law, which tells us that the voltage is equal to the product of the current by the resistance.

Therefore:

V = I*R

where:

V = voltage = 14[V]

I = current [amp]

R = resistance = 10 [ohm]

I = 14/10

I = 1.4 [amp]

Answer:

Scientists replicate other scientists' experiments to test if the result of the original investigations being tested should become a law, therefore, meaning if it should be generally accepted or discarded.

However, using different conditions than the conditions used in the original investigations is a method employed by scientists usually to:

1. Check if the values, equipment, used by the original investigations can give similar results if the values are lowered or increased and to also test if the result of the original investigations can be the same even if conditions are adjusted.

2. Check the accuracy of some experimental results especially when those original investigations are the first to speak about a new topic/finding. Definitely, other scientists would use different conditions to provide a broad knowledge and a general acceptance.

Galileo's investigation on the moon rejected popular beliefs of the content of the moon paved the way for further investigations by other astronauts. Galileo performed his investigations with equipment centuries back, coupled with the fact that his investigation didn't support an existing belief that paved the way for his investigation to be replicated by other astronauts.

Answer:

30.66667

Explanation:

this should be it i did the math

Answer:

13 students in each line, 2 leftover

Explanation:

12x6=72 add another 1 person to each line. Now you have used 78 students and 2 are leftover.