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प्रश्न
What is the amount of energy spent by the heart in pumping blood through the body?
एक पंक्ति में उत्तर
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उत्तर
The energy spent by the heart in pumping blood through the body is 1 J per beat.
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संबंधित प्रश्न
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?
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
The work done on an object does not depend on ______.
What is meant by a translational motion? Give one example.
Give two examples of couple action in our daily life.
A boy of mass m climbs up a staircase of vertical height h.
- What is the work done by the boy against the force of gravity?
- What would have been the work done if he uses a lift in climbing the same vertical height?
It takes 20 s for A to climb up the stairs, while B does the same in 15 s. compare the (i) work done, and (ii) power developed by A and B.
Fill in the boxe to show the corresponding energy transformation.
________ is said to be done when a force is acting on it.
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
