Abook weighs 0.5 kilograms on a book shelf that is 2 meters above the ground. what is the potential energy of the book relative to the ground? (hint: you may use 10 n/kg as the value for gravity)

Which atomic model was proposed as a result of j. j. thomson’s work?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.