Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
(a) As the height above the ground increases, the potential energy also increases.
(b) At the highest point, the height of the cricket ball is maximum and hence the potential energy is also maximum.
APPEARS IN
संबंधित प्रश्न
1 J = ______ calorie.
What do you mean by degradation of energy?
State the SI unit of work.
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
