Question

A truck travelling at 54km /hrs is slowhat down to 36km/hrs in 10 sec.find the retardation

Answer 1

Answer:-

Explanation:-------

Given:-

Initial Speed = 54 km/h = (54×5/18) m/s = 15 m/s

Final Speed = 36 km/h = (36×5/18) m/s = 10m/s

Time = 10 sec

To Find:-

Acceleration = ? ??

Formula To be used:-

Acceleration = v - u/t

Solution:-

Acceleration = v - u/t

Acceleration = 10-15/10

Acceleration = -5/10

Acceleration = -0.5 m/s²

Acceleration = -0.5 m/s² it means Retardation = 0.5 m/s²

Hence, Retardation of the truck is 0.5 m/s².

Answer 2

Answer:

u=54

v=36

t=10

a=v-u

    t

54km/hrs=54x5/18=15m/s

36km/hrs=36x5/18=10m/s

∴10-15/10

-5/10

-0.5m/s

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