1. An object of mass 1.00 kg is attached to a vertical spring with spring constant 100 N/m. The object is held at rest in a position such that the spring is stretched upward a distance 1.00 cm beyond its undisturbed length.If the object is released, how far will it drop before coming to rest? Answer is 3.06.
2. A 50.0-kg satellite is in a circular orbit about a planet. The potential energy of the orbit is -4.00 × 107 J. Whatis the speed of the satellite? Answer is 894m/s
3. A 20-kg object is resting at the top of a table 1.6 m above ground level. The object is then picked up and moved to a height of 8.7 m above ground level. What is the change in the gravitational potential energy of this object? Use g = 10 m/s2. Answer is 1390 J.