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संबंधित प्रश्न
A box of weight 150 kgf has gravitational potential energy stored in it equal to 14700 J. Find the height of the box above the ground. (Take g = 9.8 N kg-1)
State the energy transformation on the following:
Electricity is obtained from solar energy.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Write an expression for work done by a force depends?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
