Advertisements
Advertisements
प्रश्न
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
Advertisements
उत्तर
No there is no work done against the force of gravity because the displacement and the direction of force are at an angle of 90°.
Explanation:
Walking involves doing the same amount of work against gravity as standing because the weight of the body is the same.
So, the coolie does work against gravity equal to the total weight he is carrying (his body weight and the weight of whatever he is wearing, carrying, etc).
APPEARS IN
संबंधित प्रश्न
Define the term energy.
Define 1 joule of energy.
How is work related to energy?
Differentiate between energy and power.
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
What is the ratio of SI units to CGS units of 'work'?
Name the CGS unit of work.
Give an example
Chemical energy changes to electrical energy.
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
