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संबंधित प्रश्न
What is nuclear energy?
Give one relevant example for the following transformation of energy:
Electrical energy to mechanical energy.
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
What do you understand by the kinetic energy of the body?
Is it possible that a body may possess energy even when it is not in motion?
What kind of energy is possessed in a situation when?
A shooting arrow.
A boy sits and stands repeatedly. Draw a graph showing the variation of potential energy with time.
A body of mass m is taken from a height h to 2h. What is the increase in its 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)
Can you tell?
Describe one natural chain of transformation of energy.
