Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Yes.
संबंधित प्रश्न
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
Is work a scalar or a vector quantity?
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
Fill in the boxe to show the corresponding energy transformation.
An electric motor of power 100 W is used to drive the stirrer in a water bath. If 50% of the energy supplied to the motor is spent in stirring the water. Calculate the work done on the water in one minute.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
