Kinematics of Rotational Motion

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7.1Kinematics of Rotational Motion

Kinematics of Rotational Motion Revision Questions

1) The rotor of an engine having a radius of 21 cm rotates unformly at 300 rot/min. Calculate the distance travelled by rotor's peripheral points during 10 s. Take π = 22/7.

Physics Tutorials: This image provides visual information for the physics tutorial Kinematics of Rotational Motion
  1. 6600 m
  2. 66 m
  3. 1.32 m
  4. 0.66 m

Correct Answer: B

2) The blade of a helicopter rotating at 720 rot/min stops moving in 15 s after it lands and the pilot turns the engine off. What is the angular displacement of any blade's point during this process?

  1. 90 rad
  2. 90 π rad
  3. 360 rad
  4. 48 rad

Correct Answer: A

3) A boy turns uniformly around his head a 1.6 m rope at whose edge he has attached a stone. The stone makes 24 rotations in a minute.

Physics Tutorials: This image provides visual information for the physics tutorial Kinematics of Rotational Motion

What is the value of centripetal acceleration of the stone during this process? Take π = 3.14.

  1. 1.64 m/s2
  2. 1.024 m/s2
  3. 10.1 π m/s2
  4. 10.1 m/s2

Correct Answer: D

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