Circular motion and angular velocity Quiz
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5 questions, one answer each
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1. What is 90° in radians?
- A. π/4
- B. π/2
- C. π
- D. 2π
2. A wheel completes 5.0 revolutions in 2.0 s. What is its angular velocity?
- A. 2.5 rad s⁻¹
- B. 10 rad s⁻¹
- C. 16 rad s⁻¹
- D. 31 rad s⁻¹
3. A body moves in a circle of radius 2.0 m at 4.0 m s⁻¹. What is its centripetal acceleration?
- A. 2.0 m s⁻²
- B. 16 m s⁻²
- C. 8.0 m s⁻²
- D. 32 m s⁻²
4. A body moves at constant speed in a circle. Which statement about its velocity and acceleration is correct?
- A. Velocity is constant, acceleration is zero
- B. Velocity changes, acceleration is towards the centre
- C. Velocity changes, acceleration is along the tangent
- D. Velocity is constant, acceleration is towards the centre
5. The radius of a circular path is doubled while the angular velocity stays the same. What happens to the centripetal acceleration?
- A. It doubles
- B. It quadruples
- C. It halves
- D. It is unchanged