Q. 36 B4.0( 18 Votes )

# A 1000 kg vehicle

Vehicle Mass = 1000 kg

Initial Velocity (that is speed) let it be u = 20 ms-1

Final Velocity let it be v= 0ms-1

Distance travelled = 50 m

Let the acceleration be "a"

From equation = v2 = u2 + 2as

Putting all value

0= 20 + 2*a*50

0= 400+ 100a

0- 400= 100a (Side changing)

-400 = 100a

-400/ 100 = a (Side changing)

-4= a

a = -4 m/s2

This shows that the acceleration is in opposite direction that means it is retardation.

Retardation = 4m/s2

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