Question

The speed of a car increases from 18km/h to 36km/h in 10 second. Find its acceleration

Answer 1

Answer:

Initial velocity=. 18 km/h=5 ms^-1

final velocity =36 km/h=10 ms^-1

t=10s

acceleration=(V-u)/t

=10-5/10=5/10

=1/2=0.5 ms^-2

May this will help you.

Answer 2

Initial velocity (v) = 36km/h

[NOTE: We will be multiplying velocity with 5/18 to convert it to m/s from km/h]

= 36×5/18 = 2×5

= 10m/s

Initial velocity (u) = 18km/h

= 18×5/18

= 5m/s

Time (t) = 10s

We know that:-

Acceleration (a) = (v-u)/t

a = (10-5)/10

a = 0.5m/s²

Here is your answer and hope it will help you.