A cricketer hits a ball for four runs. What type of energy is possessed by the ball?
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground.
(a) Taking g=10 m s−2,calculate:
(i) the potential energy possessed by the ball when it is initially at rest.
(ii) the kinetic energy of the ball just before it hits the ground?
(b) What happens to the mechanical energy after the ball hits the ground and comes to rest?
Mention the type of energy (i.e. kinetic energy Kor potential energy U) possessed in the following cases.(ii) A moving cricket ball
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5mabove the ground.
(i) Determine the potential energy possessed by the ball when initially at rest.
(ii) What is the kinetic energy of the ball just before hiring the ground?
(iii) What happen to the mechanical energy after the ball hits the ground and comes to rest?