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Question 1

20 pts

A student pulls a cart across the floor with a force of 62 N. If the cart travels 65 m, how much work does the cart do on the student? Please do not include units or the answer will be marked incorrect.



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Question 2

20 pts

Object A has a mass of m with a speed of v. Object B has a mass of m and a velocity of 2v. Compared to the kinetic energy of Object A, the kinetic energy of Object B is

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4 times larger

1/2 as large

1/4 as large

2 times larger

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Question 3

20 pts

A rocket launcher has a spring constant of 214 N/m. What force is required to stretch the spring a distance of 6 m? You must show work to earn credit for your answer.
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Question 4

20 pts
An 845 N sled is pulled a distance of 185 m. The task is done by pulling on a rope with a force of 125 N at an angle of 59° with the horizontal.
• How much work is done in pulling the sled?
• What is the acceleration in the x direction, assuming that friction is negligible?
• Assuming the sled started at rest, how long does it take to pull the sled 185 m?

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Question 5

19 pts

A 43 kg child slides down a playground slide that is 3.2 m high.
What is the child's velocity as she hits the ground?
Create an LOL chart to represent this problem and then solve the problem.
All work must be shown to receive credit.
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Attempt due: Mar 27 at 11:59pm

Answer 1