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Retardation or deceleration is negative accelaration

formula for finding retardation is same as that of accelaration:

v-u/t, where v is the final velocity, u is the initial velocity and t is the time taken.

eg- a bus is travelling at 20 m/s. Brakes are applied to stop the bus. The total time taken by the bus to stop is 2 s. Find its retardation.

ans- v=0; u=20; t=2

accelaration= 0-20/2

a= -10 m's^2

retardation= 10 m/s^2 (because retardation is negative accelaration)

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13y ago

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