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प्रश्न
In the following case write yes, if the work is being done and no if no work is being done.
A man moving on the rough ground.
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उत्तर
Yes.
संबंधित प्रश्न
If the power of a motor is 100 kW, at what speed can it raise a load of 50,000 N?
How is kilowatt hour related to joule?
Differentiate between work and power.
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 force applied.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
An engine does 54,000 J of work by exerting a force of 6000 N on it. What is the displacement in the direction of the force?
Calculate the work done when:
A car is moved on a rough road through 30 m against a frictional resistance of 75 N.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
