Question

A truck travelling at 54 km/h is slow down to 36 km/h in 10 sec. Find the retardation​

Answer 1

The truck is travelling with a initial velocity of V=54m/s.

The truck is travelling with a final velocity of u=36m/s.

acceleration=V-U/T.

given time =10s.

so. 36-54/10

=-18/10

=-1.8

so. the retardation is 1.8 negative.

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Answer 2

Explanation:

u = 54×5/18 = 15m/s

v = 36×5/18 = 10m/s

retardation= (u-v)/t

= 15-10/10

= 5/10

= 0.5m/s²