A motorcycle is travelling east (taken as the positive direction) at

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A motorcycle is travelling east (taken as the positive direction) at 20 m/s20\,\text{m/s}. The rider applies the brakes producing a uniform acceleration of −3 m/s2-3\,\text{m/s}^2. What will be the velocity of the motorcycle 4 s4\,\text{s} after the brakes are applied? (a) 32 m/s32\,\text{m/s} east (b) 17 m/s17\,\text{m/s} east (c) 8 m/s8\,\text{m/s} east (d) 8 m/s8\,\text{m/s} west

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