Question

A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find
the acceleration​

Answer 1

7.5m/sec²

Explanation:

It is given that the car started from rest.

so,u:0m/sec

Then it acquires the velocity of 54km/hour

Now we need to convert it into m/sec.

so,54000m/3600sec=15m/sec.

Now using acceleration formula we have:

a=v-u/t

(15m/sec-0m/sec)/2sec= 7.5m/sec²