Question

when a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be: (a) + 2 m/s2 (b) – 2 m/s2 (c) –0.5 m/s2 (d) + 0.5m/s2​

Answer 1

Answer:

+0.5m/S2

Explanation:

the term means negative acceleration

initial velocity is 10m/s

final velocity is 0 m/s

time taken is 20 sec

acceleration is 0-10/20

acceleration is -0.5 m/s2

retardation is 0.5 m/s2

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