Question

A car traveling 1200 miles north at a speed of 35 m/s slows to a speed of 8 m/s within 7 seconds . What is the cars deceleration?

Answer 1

ANSWER

The braking distance increases four times each time the starting speed doubles. This is because the work done in bringing a car to rest means removing all of its kinetic energy. So for a fixed maximum braking force, the braking distance is proportional to the square of the velocity.

Answer 2

Explanation:

here the distance is just given for confusion

a= v-u/t

a= 8-35/7

= -27/7

= -3.8 m/sec^2

deceleration is the reverse or the opposite side of acceleration

i.e if acceleration is 5 then then declaration is -5

hope it will help you