A baby carriage is sitting at the top of a hill that is 20 m high. The carriage with the baby weighs 2 kg. How much potential energy does the baby
carriage have?

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?