PLEASE HELP!! 1.The Law of Conservation of Energy states that?

A. matter cannot be created or destroyed, only stored and transferred.

B. momentum cannot be created or destroyed, only stored and transferred.

C. energy cannot be created or destroyed, only stored and transferred.

2.The total amount of kinetic and potential energy in a system that remains constant is the system's

A .mechanical energy

B. elastic energy

C. chemical energy

D. gravitational energy

3, At the top of a giant hill sits a roller coaster cart, all the energy of the cart is stored as

A. kinetic energy

B. chemical energy

C. elastic energy

D. gravitational potential energy

4. At the bottom of the hill (ground level), the roller coaster cart in the previous problem, all the energy of the cart is stored as

A. kinetic energy

B. chemical energy

C. elastic energy

D. gravitational potential energy

When a pendulum swings when will the potential energy be at a maximum?

A
B
C
D

6. If total mechanical energy = kinetic energy + potential energy, TME = KE + PE, and a roller coaster has 500 J of total mechanical energy. At the very beginning of the track the roller coaster has 500 J of potential energy, how much kinetic energy is there at the beginning of the track?

A 25 kg child is sitting at the top of a 4 m tall slide, what is his potential energy?

It the same child has a velocity of 2 m/s half-way down the slide, what is his kinetic energy?

If the TME energy for the same child on the slide is 100 J, how much potential energy does the child have half-way down the slide?