Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
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
संबंधित प्रश्न
What are the various energy transformations that occur when you are riding a bicycle?
State the energy changes in the following case while in use:
An electric iron
State the energy changes in the following while using an electric motor.
State the energy changes that occur in the following :
An electric generator (or dynamo).
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in photosynthesis in green leaves.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in respiration.
State the energy changes in the following case while in use:
loudspeaker
State the energy changes in the following case while in use:
Burning coal
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
Can any object have mechanical energy even if its momentum is zero? Explain.
