Question

A car moving with velocity 10m/s applies brake and stops in 4s. Find acceleration?

A2.5

B-2.5

C-5

D-40​

Answer 1

Explanation:

u is 10 m/s

v is 0 (comes to rest)

t is 4s

a=v-u/t

=0-10/4

=-10/4

= -2.5 metre per second square

Therefore, answer is -2.5(b)

Answer 2

Answer:

Hope it helps u

Explanation:

Acceleration = v-u/t

Given , intial velocity (u) = 0m/s

Final velocity (v) = 10m/s

Time = 4s

=> 10-0/4

=> 10/4

=> 2.5m/s^2

Car applies brake means the acceleration is negetive

Hence the acceleration is -2.5m/s^2 .

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