A 2 kg lump of clay falls to the ground from a height of 4 meters. How much work does gravity do on the clay. Enter a number in J.

How fast is the clay moving when it hits the ground (in m/s)? (you could go back to kinematic equations from Chapter 2 to solve this, but know you know a more clever way using the Work-Energy Theorem!)

From the time the clay is dropped until the time it rests (speed =zero) on the ground, which things do work of any kind on the clay? (add together true answers and enter)
1. The clay
2. The air
4. The ground
8. Gravity




For the work done by the air, is it positive or negative work?
A. Positive
B. Negative


For the work done by gravity, is it positive or negative work?
A. Positive
B. Negative


For the work done by the ground, is it positive or negative work?
A. Positive
B. Negative