A cyclist rides at a constant speed of on a circular track of radius
PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A cyclist rides at a constant speed of 5m/s on a circular track of radius 20m.
(i) Explain clearly why the cyclist is said to be in accelerated motion even though his speed does not change.
(ii) Compare this situation with the same cyclist moving at 5m/s on a straight road. State, with reason, whether he is accelerated in that case.
(iii) Name the physical quantity that keeps changing for the cyclist on the circular track and remains unchanged on the straight road.