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प्रश्न
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
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उत्तर
The man moving along the slope expends more energy. It is because, while moving along the slope, he gains height and hence has extra potential energy.
संबंधित प्रश्न
Write the expression for work done by a force.
State the law of conservation of energy.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Why does a spanner have a long handle?
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
