Advertisements
Advertisements
प्रश्न
उत्तर
APPEARS IN
संबंधित प्रश्न
A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same ?
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 highest point .
Select the renewable and non-renewable sources of energy from the following:
Water
Select the renewable and non-renewable sources of energy from the following:
Oil
What is ocean? Explain in brief.
State two disadvantages of producing electricity from solar 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
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
A ball of mass 0.5 kg slows down from a speed of 5m/s-1 to that of 3m/s-1. Calculate the change in kinetic energy of the ball.
Give three examples of bodies possessing kinetic energy.
