Question

A driver decreases the velocity of the car from 72 km/h to 36 km/h in 5 seconds. Find the acceleration.

Answer 1

Answer:

Acceleration = final velocity - initial velocity / Time

Explanation:

Here v = 36km/h convert to m/s =36/1*5/18= 10m/s

Here u = 72km/h convert to m/s =72/1*5/18= 20m/s

Time = 5s

hence Acceleration = v-u /t

=10-20/5

-10/5=-2

hence Acceleration = -2m/s or retardation = 2m/s