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In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
Express joule in terms of erg.
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
The work done on an object does not depend on ______.
Give two examples of work done.
Give an example
Electrical energy changes to heat energy.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
