Question

Search Results Web results A car of mass 650 kg is moving at a speed of 0.7

Answer 1

W = 1413.75 J

Step-by-step explanation:

It is given that,

Mass of car, m = 650 kg

Initial speed of the car, u = 0.7 m/s

Let a man pushes the car, increasing the speed to 2.2 m/s, v = 2.2 m/s

Let us assume to find the work done by the man. According to the work energy theorem, work done is equal to the change in kinetic energy.

`W=(1)/(2)m(v^2-u^2)\\\\W=(1)/(2)* 650* ((2.2)^2-(0.7)^2)\\\\W=1413.75\ J`

So, the work done by the car is 1413.75 J.