A rock falls 30 m. Its KE before it strikes the ground is 4,392 J. What is the

mass of the rock?

A. 15 kg

B. 146 kg

C. 1.5 kg

D. 3.0 kg

Objects in free fall are weightless. true or false?

What surface features does mars have that are also common on earth?

A student throws a 5.0-newton ball straight up. What is the net force on the ball at its maximum height? (1) 0.0 N (3) 5.0 N, down (2) 5.0 N, up (4) 9.8 N, down

What is terminal speed? When a skydiver has reached terminal speed, what is the are resistance equal to? What is the skydiver's acceleration? Be sure to use at least 3 to 4 complete content related sentences.

A boy pushes on a parked car with a force of 200 n. the car does not move. how much work does the boy do on the car?

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.