Question

An object moving within a velocity of 30m/s decelerate at the rate of 1.5m/s square.Find the time taken by the object to come to rest.

Answer 1

time will be 20 second

Answer 2

Time taken by object to come to rest is 20 sec.

Explanation:-

Given :-

An object moving with a velocity = 30 m/s decelerate at the rate = 1.5 m/s²

To Find :-

Time taken = ?

Solution :-

As, it is deceleration so a = -1.5 m/s²

v = u + at

0 = 30 + [-1.5(t)]

0 - 30 = -1.5(t)

-30 = - 1.5t

-30/-1.5 = t

30/1.5 = t

20 = t

So, Time taken is 20 seconds.