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
Name the forms of energy which a wound-up watch spring possesses.
State two advantage of producing hydroelectricity.
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
State the conditions of equilibrium for a rigid body.
A boy does work when he pushes against a brick wall. (yes/no).
What is the SI unit of work?
Name the CGS unit of work.
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
