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yKpoI14uk [10]
4 years ago
8

A push pull or other action that has the ability to change motion

Physics
1 answer:
algol134 years ago
7 0

force should be the answer

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A 5.18x10^4 kg railroad car moves on a frictionless horizontal rails until it hits a horizontal spring stopper with a force cons
nalin [4]

Answer:

The initial velocity of the cart was 0.91m/s.

Explanation:

When the car comes to a stop it has delivered all of its kinetic energy to the spring; therefore,

\dfrac{1}{2}kx^2 = \dfrac{1}{2}  mv^2

solving for v we get:

v = x\sqrt{\dfrac{k}{m} },\\

we put in k = 4.21*10^{5}N/m, m = 5.18*10^{4}kg, and x = 0.32m to get:

v = (0.32m)\sqrt{\dfrac{4.21*10^5}{5.18*10^4} },\\

\boxed{v = 0.91m/s.}

4 0
4 years ago
C) A sample of substance of volume 10 cm3 was brought back to Earth from the Moon.
postnew [5]

Answer:

8125

Explanation:

P=0,13 N\\a=1,6 N/kg\\m=P/a=0,13/1,6=0,08125\\V=10(cm)^{3} =10^{-5} meters^{3}  \\p=m/V=0,08125/10^{-5} =0,08125*100000=8125kg/meters^{3}

3 0
4 years ago
What is atmospheric refraction?​
patriot [66]

Answer:

Atmospheric Refraction is the bending of light rays when they pass through the layers of earths atmosphere

Explanation:

Hope this helps

5 0
3 years ago
Read 2 more answers
Which of the diagrams below show forces that would result in a movement of the block to the left?
xenn [34]

Diagram A will result in the movement of the block to the left as a result of the forces.

<h3>What is Force?</h3>

This is referred to an influence which is capable of changing the motion of an object.

Diagram A has equal upward and downward force and left side which is 60N is higher than the right side which has 20N. The block will therefore move to the left.

Read more about Force here brainly.com/question/25239010

#SPJ1

4 0
2 years ago
What is the power generation in a machine that produces 76 j in 3.7s
ICE Princess25 [194]
Power is the ratio between energy and time:
P= \frac{E}{t}
In our problem we have E=76 J and t=3.7 s. Therefore, the power is
P= \frac{76 J}{3.7 s} =20.5 W
3 0
3 years ago
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