A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?
Correct answer: C. 0
- A. πR
- B. 2π R
- C. 0
- D. 4πR
Explanation
After two complete revolutions, the body returns to its starting point, so its displacement is 0 m. It travels a path length of 2 x 2πR = 4πR m, but the ratio of displacement to path is still 0. The likely mistake is choosing 4πR, which is the covered distance rather than the displacement-to-distance ratio.
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About Displacement and Velocity
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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