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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
State the condition when the work done by a force is positive. Explain with the help of examples.
State and define the S.I. unit of work.
What physical quantity does the electron volt (eV) measure? How is it related to the S.I. unit of that quality?
Name two places in india where electricity is generated from nuclear power plants.
What do you mean by a centrifugal force?
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
A man raises a box of mass 50 kg to a height of 2 m in 20s, while another man raises the same box to the same height in 50s. Calculated:
- the work done, and
- the power developed by each man. Take g = 10 N kg-1.
State and define the unit of force in the S.I. system.
A force of 1 kgf displaces a body by a distance of 10 cm
(i) in direction of force,
(ii) normal to the force
(iii) at an angle of 60° to the direction of the force.
Calculate the amount of work done in each case. (Take: g = 9.8 ms−2 )
