Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
APPEARS IN
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?
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Define the term energy.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?
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?
State the energy changes which take place when A toy car with a wound spring moves on ground.
________ is said to be done when a force is acting on it.
