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प्रश्न
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उत्तर
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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
What are the units of (a) work, and (b) energy?
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Name the force acting away from the centre of circular path.
Distinguish between work and power.
Give an example
Chemical energy changes to heat energy.
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.
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.
