Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Kinetic energy.
APPEARS IN
संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
A moving cricket ball.
Name the type of energy (kinetic or potential) possessed by the following:
A stone at rest on the top of a building.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A compressed spring
State two advantages of producing electricity from solar energy.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Name the energy changes for the following:
pendulum
Is it possible that a body may possess energy even when it is not in motion?
State two advantages and two disadvantages of using hydro-energy for producing electricity.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
