Advertisements
Advertisements
प्रश्न
The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.
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
Draw a simplified diagram of a lemon crusher, indicting of load and effort
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force
What are the S.I. and C.G.S units of work? How are they related? Establish the relationship.
State and define the S.I. unit of work.
A boy weighing 350 N climbs up 30 steps, each 20 cm high in 1 minute, Calculate:
- the work done and
- power spent.
A man spends 7.4 kJ energy in displacing a body by 74 m in the direction in which he applies force, in 2.5 s. Calculate the power spent (in H.P) by the man.
In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.
State the C.G.S. unit of work. How it is related to its S.I. unit?
For the following scenarios, state whether the work done by gravity is positive, negative, or zero.
A person walks on a levelled road.