Question

A train moving with a velocity of 20 m/s is brought to rest by applying brakes in 5 s. The distance travelled by the train in first 3 s after applying brakes will be
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Answer 1

Answer:

u=20m/s,v=0,t=5s

v=u+at

0=20+a×5

a=−4m/s

2

Therefore, Retardation=4m/s

2