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प्रश्न
Give two examples of couple actions in our daily life.
Write one example of a couple.
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उत्तर
- Opening and closing the cap of a bottle
- Turning a key in a lock
संबंधित प्रश्न
Work is said to be done by a forte only when ................
When does a force perform work?
The moon is revolving around the earth in a circular path. How much work is done by the moon?
State two factors on which the work done on a body depends.
What are the two kinds of mechanical energy?
In case of negative work, the angle between the force and displacement is :
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
