A collision occurs in a closed system. How often are linear momentum, kinetic energy and total energy conserved? Linear Momentum
Kinetic Energy
Total Energy

A. Always, Always, Always

B. Always, Sometimes, Always

C. Always, Sometimes,
Sometimes

D. Sometimes, Sometimes,
Always

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What are two different ways you could find the value of a? explain these methods.