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संबंधित प्रश्न
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
Write an expression for work done by a force depends?
A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
What are the advantages and disadvantages of using solar cells for producing electricity?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.
