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प्रश्न
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उत्तर
Four different forms of energy:
(i) Solar energy
(ii) Mechanical energy
(iii) Wind energy
(iv) Nuclear energy
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संबंधित प्रश्न
Write the expression for work done by a force.
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
State two advantage of producing hydroelectricity.
Give two examples of work done.
On what factors does the work done by a force depend?
Give an example
Electrical energy changes of sound energy.
(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?
(iii) What will be the kinetic energy of ball, when it returns to the starting point, neglecting the air resistance?
(iv) What will be the potential energy of ball at highest point?
