Question

Do all five questions

Question 1

20 pts

Ignoring the effects of air resistance, if a ball falls freely toward the ground, its total mechanical energy

Group of answer choices

increases

remains the same

not enough information

decreases

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Question 2

20 pts

A child jumps off a wall from an initial height of 16.4 m and lands on a trampoline. Before the child springs back up into the air the trampoline compresses 1.8 meters. The spring constant of the elastic in the trampoline is K = 288 N/m. Find the mass of the child. Report your answer to 1 decimal place. Please show your work to earn full credit.

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Question 3

20 pts

A 16.0 kg cart is moving with a speed of 14.0 m/s. To what height up a frictionless hill will the cart roll before starting to roll back down? Report your answer to 1 decimal place. Please show your work to earn full credit.

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Question 4

20 pts

An object is thrown upward into the air and follows a parabolic trajectory. As it moves through the air its potential energy

Group of answer choices

increases, then decreases

stays the same

decreases, then increases

increases only

decreases only

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Question 5

20 pts

An object is thrown upward into the air and follows a parabolic trajectory. As it moves through the air its kinetic energy

Group of answer choices

decreases, then increases

stays the same

increases only

decreases only

increases, then decreases

Answer 1

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