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The following physics revision questions are provided in support of the physics tutorial on Centripetal Force. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Centripetal Force tutorials. The Centripetal Force calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
---|---|---|---|---|---|---|

7.3 | Centripetal Force |

**1)** A small sphere is moving laterally at 0.4 m/s inside a cylindrical glass as shown in the figure below. What is the maximum diameter the glass must have in order to keep the sphere rotating through the lateral face without touching the lower base of glass? Take g ≈ 10 m/s^{2}.

- 1.6 cm
- 3.2 cm
- 6 cm
- 60 cm

**Correct Answer: B**

**2)** What is the minimum velocity a vertical roller coaster must have so that a 40 kg child not exerting any pushing force on the seat when she is at the highest position during rotation? The radius of curvature of the roller coaster is 80 m.

- 2 m/s
- 8.9 m/s
- 28.3 m/s
- 80 m/s

**Correct Answer: C**

**3)** The rotor of an engine increases its angular velocity from 2 rad/s to 5 rad/s in 0.1 s. What is the total acceleration of peripheral points of the rotor at the end of this process if its diameter is equal to 20 cm?

- 3.9 m/s
^{2} - 0.39 m/s
^{2} - 3 m/s
^{2} - 2.5 m/s
^{2}

**Correct Answer: A**

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- Continuing learning rotation - read our next physics tutorial: Kinematics of Rotational Motion

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