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प्रश्न
State the energy transformation on the following:
Electricity is obtained from solar energy.
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उत्तर
Light energy into electrical energy
संबंधित प्रश्न
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
Derive a relationship between S.I. and C.C.S. unit of work
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
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A boy does work when he pushes against a brick wall. (yes/no).
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.

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(ii) Calculate P.E. gained by block. [g=10ms-2]
(i) A 200g ball is thrown vertically upward with an initial velocity of 30 ms-1. Draw a velocity-time graph for the motion of ball.
(ii) How long will the ball take to reach the highest point?
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(iv) What will be the potential energy of ball at highest point?
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
