question_answer 41)

  In which of the following cases of motions, the distance moved and the magnitude of displacement are equal? (a) If the car is moving on straight road                  (b) If the car is moving in circular path (c) The pendulum is moving to and fro                   (d) The earth is revolving around the sun

Answer:

  (a) The distance moved and magnitude of displacement are equal only in the case of motion along a straight line. Because displacement is the shortest path between initial and find path. So, for car moving on straight road, distance moved and magnitude of displacement are equal.