Moderate

A car is moving in a circular track of radius 20m at a constant speed of 20m/sec. Find the centripetal acceleration?

Correct answer: A. 20 m/s2

  • A. 20 m/s2
  • B. 40 m/s2
  • C. 30 m/s2
  • D. 10 m/s2

Explanation

The formula for centripetal acceleration =v2/r, hence, 202/20=20m/s2

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About Angular and Linear Quantities

Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.

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