1. The total energy E of an object of mass m that moves in one dimension under the influence of only

1. The total energy E of an object of mass
m that moves in one dimension under the influence of only conservative forces
can be written as

Use conservation of energy, dE /dt = 0, to
predict Newton’s second law.

2. A 0.40-kg ball is thrown with a speed of
8.5 m/s at an upward angle of 36°. {a) What is its speed at its highest point,
and (b) how high does it go? (Use conservation of energy.)