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प्रश्न
State the energy changes which take place when:
A body thrown vertically upwards from the ground.
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उत्तर
The kinetic energy changes to potential energy.
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Which of the following produces more heat (per unit mass) on burning?
Name the type of energy (kinetic or potential) possessed by the following:
A moving bus.
What is wind energy?
Name the energy changes for each of the following cases:
dynamo
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
State the energy changes which take place when:
A magnesium ribbon burns in air.
Give one example when:
Electric energy changes to potential energy.
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)
