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प्रश्न
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
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उत्तर
- A wind-mill works against the gravitational force to lift water.
- Hence, work is done by the wind-mill in lifting water from the well.
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संबंधित प्रश्न
When do we say that work is done?
Power spent by a body depends on the time for which it does work.
Define work.
State the S.I. unit of work and define it.
State the SI unit of work.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
A max X goes to the top of a building by a vertical spiral staircase. Another man Y of the same mass goes to the top of the same building by a slanting ladder. Which of the two does more work against gravity and why?
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
