Question

Read the following passage and answer the questions given below Roopa was cycling on a circular track. The direction of velocity changes at every point but its magnitude remains constant. The direction of velocity at any point of the circular track is along the tangent at that point as shown in figure. i) Motion of Roopa who is moving along a circular path with constant speed is an accelerated motion because: a) Magnitude of motion is constant b) direction of motion is changing at every point c) athlete’s displacement is zero d) none are suitable options ii) Expression for the velocity in uniform circular motion in terms of time: a) v = u + at b) a=(v-u) / t c) v=2π r / t d) v = 2π rt iii) Roopa completes one round of a circular track of diameter 200m in 20 sec. Distance covered by her after 2 min and 40 sec will be a) 650 π meter b) 700 π meter c) 725 meter d) 800 π meter iv) What will be the displacement at the end of this time? a) 200 m b) 100 m c) Zero d) Half of the

Answer 1

Answer:

When a body moves in a circular path its direction of motion changes continuously. So, even when the body moves at a constant speed, its velocity changes.

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