Advertisements
Advertisements
प्रश्न
The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.
Advertisements
उत्तर
When a cricket player catches a ball, he exerts force against the direction of the ball, which results in negative work.
APPEARS IN
संबंधित प्रश्न
A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:
- The work done by them.
- The power developed by them.
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall

1) Name the force exerted by the table top
2) What is the direction of the force?
A coolie X Carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head move the same distance on a frictionless horizontal platform. Who does more work? Explain the reason.
State and define the S.I. unit of work.
What is meant by a rotatory motion? Give one example.
State the condition when a force produces
(i) linear motion.
(ii) rotational motion, in a body.
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
Work done by a force is equal to the product of ....... and ....
State the condition when the work done by the force is positive
What is the S.I. unit of work? Define it.
