Question

A car traveling at a Speed 54km/h is brought rest in 90 s find the distance travelled by the car before coming to rest​

Answer 1

Explanation:

As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second. ... The power rating indicates the rate at which that machine can do work upon other objects.

Answer 2

Answer:

The speed of the car = 54 Km/h = 15 m/sec

given u=15m/s

v=0 (rest)

v=u+at

The acceleration

a=-u/t=-15/90 =-1/6 m/s2

or retardation = 1/6 m/s2