You lift a 2.0 kg book from a shelf that is 1 m from the floor. What is the potential energy with respect to floor?

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Idon’t quite understand this problem

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational