Advertisements
Advertisements
Question
Is it possible that an object is in a state of accelerated motion due to external force acting on it, but no work is being done by the force? Explain it with an example.
Solution
Yes, it is possible that an object is in a state of accelerated motion due to external force acting on it, but no work is being done by the force.
For example, an object moving in a circular path due to centripetal force acting on it.
At any instant of time, a constant acceleration due to the centripetal force act on the object along the radius towards the centre while the direction of displacement is tangential to the circle. That is, force and displacement are perpendicular to each other and hence no work is being done.
APPEARS IN
RELATED QUESTIONS
State the energy changes in the following case while in use:
An electric iron
State the energy changes in the following while in use A loudspeaker .
State the energy changes in the following while using an electric motor.
Fill in the blank
Green plants convert _________ energy into chemical energy.
State the energy changes that occur in the following :
Lighting of a torch bulb.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the unwinding of a watch spring.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the Explosion of crackers.
State the energy changes in the following case while in use:
Microphone
State the energy changes in the following case while in use:
Bio-gas burner
State the law of conservation of energy.
