A particle is moving along a circular path of radius 2 m and with a uniform speed of 5 ms-1. What will be the change in velocity when the particle completes half of the revolution?
Correct answer: B. 10 ms-1
- A. Zero
- B. 10 ms-1
- C. 20 ms-1
- D. 2 ms-1
Explanation
Velocity vectors at opposite points are equal in magnitude but opposite in direction; change Δv = v(final) − v(initial) = (−5) − (+5) = −10 m/s, magnitude 10 m/s.
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