Question

A boy of mass 40 kg is moving in a car with uniform velocities at
some intervals. The velocity acquired by the car and its corresponding
kinetic energies are shown in following table :
Velocity of car
Kinetic energy
500J 5 m/s​

Answer 1

Answer:

Velocity of the boy = velocity of the car

Kinetic energy possessed by the boy =

2

1

mv

2

Here m=40kg, v=15ms

−1

=

2

1

×40kg×(15ms

−1

)

2

=4500J