Answer: Height h only.
- A Angle of slope only
- B Height h only
- C Both angle and height
- D Mass of ball
Correct answer: B. Height h only
Explanation: Energy conservation: mgh = (1/2)mv<sup>2.</sup> v = sqrt(2gh). Speed depends only on height h, not slope angle.
As a pendulum swings, total mechanical energy (KE+PE) stays constant: at the highest points A and C, all energy is potential (zero speed); at the lowest point B, all of that energy has converted into kinetic energy (maximum speed).
Concept context
Work-energy theorem, potential energy, conservation of energy, collisions.