Question

A car of mass increases it's speed from 54 km/hrs to 108 km/hrs. find the increase in kinetic energy of the car.​

Answer 1

Answer:

ANSWER

Initial Velocity, u=54km/hr=15m/s

Final velocity , v=72km/hr=20m/s

Mass =1500kg

Initial kinetic energy

2

1

mu

2

⇒

2

1

1500×15×15=168750J

Final kinetic energ⇒

2 1500×20×20=300000J

So, change in kinetic energy = work done=300000−168750=131250J