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A ball rolling on the ground possesses
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the ground.
State the changes in form of energy while producing hydro electricity.
State two uses of solar cells.
State the energy changes which take place when:
A body released from rest from the top of a building.
Give one example when:
Heat energy changes to kinetic energy.
Give one example when:
Mechanical energy changes to electric energy.
Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
What is meant by energy?
