AP Physics Homework
7-7
Collisions in two dimensions
1. Describe a real life example of conservation of momentum in two dimensions:
2. What happens when a moving objects hits a target not head on:
3. Write the equation for the x component of momentum conservation:
4. Write the Y-component equation of momentum:
5. Solve Example 7-11, then check you solution with the book:
Read through the problems solving and explain below how you would solve for momentum
conservation and collision problem:
7-8
Centers Of Mass
1. What is general motion?
2. Explain Center of Mass:
3. Why do we use center of mass?
4. What equation do you use if the masses are equal to calculate center of mass?
5. What equation do you use if masses are not equal?
6. Work through example 7-12:
7. What is center of gravity?
Do the following problems from pg. 194, # 45, 49 and 51. Extra challenge, read 7-9 and 7-10 and try #59
or 61: