Question

a car is retarded by applying brakes at the rate of 2 metre per second square it is finally stopped in 10 seconds find its initial velocity​

Answer 1

Answer:

Acceleration is given by

a = (v - u)/t

-2 m/s² = (0 - u)/10 s

[Negative sign because it’s retardation]

-20 m/s = -u

u = 20 m/s

∴ Initial velocity of car is 20 m/s

Answer 2

Answer:

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