Question

When a car driver travelling at a speed of 10m/s applies brakes and brings the car to rest in 20s, then the retardation will be :​

Answer 1

Explanation:

In the given question

u=20m/s

v=0m/s

t=10s

and a=?

we know the formula v =u + at

so putting the values we get

0 = 20 + a X 10

- 20 = 10 a

-2 = a

we get acceleration is -2 so retardation will be +2 m/ sec sq.

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Answer 2

Answer:

Given ,

u=20 m/s

v=0 m/s

t = 10s

a =?

0 = 20 + a x 10

=10a= -20

a= -2

Explanation:

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