Based on the diagram of a ball rolling down hill, what statement is true? a) the ball in box c has less kinetic energy than the ball in box b. b) the ball in box a has more kinetic energy than the ball in box b. c) the ball in box c has more potential energy than the ball in box b. d) the ball in box c has less potential energy than the ball in box b.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?