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प्रश्न
1 J = ______ calorie.
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उत्तर
1 J = 0.24 calories.
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संबंधित प्रश्न
Define 1 J of work.
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
A boy of mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate:
- the force of gravity acting on the boy,
- the work done by him against the force of gravity,
- the power spent by boy. (Take g = 10 m s-2)
Fill in the blank with suitable word :
1 joule is the work done when a force of 1 __________ moves an object through a distance of one __________ in the direction of __________.
The work done on an object does not depend on the :
A uniform circular motion is an accelerated motion. Justify it.
Is the motion of moon around the earth in circular path an accelerated motion?
Give two examples of work done.
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
