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प्रश्न
In which of the following cases is work being done:
- A boy pushing a heavy rock
- A boy climbing up the stairs
- A coolie standing with a box on his head
- A girl moving on the road.
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उत्तर
work being done in the following cases
(b) A boy climbing up the stairs
(d) A girl moving on the road.
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संबंधित प्रश्न
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
What are the quantities on which the amount of work done depends? How are they related to 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?
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Why does a spanner have a long handle?
What is the SI unit of work?
Can work done be zero even if force acts on the body?
List any six forms of energy and write a short note on each of them.
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
