Question

A glider is free to move along an air track, which is raised at an angle of 45° above a horizontal tabletop. The glider is first placed at the top of the track so that it is at a height h above the tabletop, and after being released, it reaches a speed v at the bottom of the track. Assuming friction acts on the glider during its motion, which of the following statements is(are) true when the glider has reached the halfway point, at a height h/2 above the tabletop?

(1) The gravitational potential energy of the glider is half of the original    gravitational potential energy.

(2) The change in gravitational potential energy is the same as the change in    kinetic energy.

(3) The kinetic energy of the glider is half of the original gravitational potential     energy of the glider.

Group of answer choices

(1) only

(2) only

(3) only

(1) and (2) only

(1), (2), and (3)

Answer 1

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