# Homework Help: Various Physics Practice Problems for Exam

1. Dec 13, 2015

### Charles Lee

Hello everyone,

I found various physics problems online randomly and looks like I can use it to help me study for tests and was wondering if you guys can provide a simple solution/explanation to it. It would be a great help, Thank you!

Conservation of Energy:

a. If Spring 2 can only compress by 2 meters, what mass must the bock have, given the setup depicted in diagram 1, to compress spring 2 by exactly that amount? Note: Assume that the block starts from rest

b. What is the block’s maximum velocity and when and where does it occur?
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Work-Energy Theorem:
a. What physical condition must be true for the Work-Energy Theorem to become a statement of Conservation of Energy?

b. Use your answer from part a) to derive a statement of Conservation of Energy from the Work-Energy Theorem.

c. Use your answer from part b) to demonstrate that energy is conserved by passing back and forth between Kinetic Energy and Potential Energy.
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3. Collisions:
a. Determine m1 and v3, based on the initial and final conditions depicted in diagram 2...

2. Dec 13, 2015

### JeremyG

Hi Charles, unfortunately we do not provide solutions here in PF, we merely aid you in arriving at a solution yourself. Have you tried these problems yet?