Kenny klutz drops his physics book off his aunt’s high-rise balcony. It hits the ground below 1.5 s later. A. with what speed does it hit?

B. How high is the balcony?
Ignore air drag.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.