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प्रश्न
No work is done by a force if the body
विकल्प
moves in direction of force
does not move
moves in opposite direction
none of the these
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उत्तर
does not move
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संबंधित प्रश्न
Define the term energy.
Name the forms of energy which a wound-up watch spring possesses.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
In case of negative work, the angle between the force and displacement is :
A uniform circular motion is an accelerated motion. Justify it.
What is power? How do you differentiate kilowatt from kilowatt-hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of waterfalls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s–2)
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
