---
title: "A stone is falling at a constant velocity vertically down a tube filled with oil. Which of the following statements about the energy changes of the stone during its motion are correct?I. The gain in kinetic energy is less than the loss in gravitational potential energy.II. The sum of kinetic and gravitational potential energy of the stone is constant.III. The work done by the force of gravity has the same magnitude as the work done by friction."
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url: "https://nerd-notes.com/ubq/91236/"
date_modified: "2025-10-04T03:13:44+00:00"
---

# A stone is falling at a constant velocity vertically down a tube filled with oil. Which of the following statements about the energy changes of the stone during its motion are correct?I. The gain in kinetic energy is less than the loss in gravitational potential energy.II. The sum of kinetic and gravitational potential energy of the stone is constant.III. The work done by the force of gravity has the same magnitude as the work done by friction.

A stone is falling at a constant velocity vertically down a tube filled with oil. Which of the following statements about the energy changes of the stone during its motion are correct?

I. The gain in kinetic energy is less than the loss in gravitational potential energy.

II. The sum of kinetic and gravitational potential energy of the stone is constant.

III. The work done by the force of gravity has the same magnitude as the work done by friction.

- **A.** Only I
- **B.** Only II
- **C.** I and II
- **D.** I and III
- **E.** II and III

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/91236/*