- 1.
- How much work would you have to do to lift a 10 kg object through a vertical distance of 2 m?
- 2.
- By Newton's third law the object is also exerting a force on you as you lift it. How much work does it do on you during this process?
- 3.
- What power would be exerted if you did this in 2 seconds?
- 4.
- True or false: kinetic energy is always conserved?
- 5.
- True or false: momentum conservation is a direct consequence of Newton's 2nd and 3rd laws of motion, so we don't expect it to be true for systems that do not obey Newton's laws exactly.

1999-09-29