Question

A truck travelling at 54 km/h is slow down to 36 km/h in 10 seconds. Find the retardation ( negative acceleration)​

Answer 1

Answer:

We have,

Initial velocity, u = 54 m/s

= ( 54 × 5/18 ) m/s

= 15 m/s

Final velocity, v = 36 m/s

= ( 36 × 5/18 ) m/s

= 10 m/s

Time, t = 10 sec

We know that,

Acceleration, a = ( v – u ) / t

= ( 10 – 15 ) / 10

= – 5 / 10

= – 1 / 2

= – 0.5 m/s²

So, retardation = 0.5 m/s²

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