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प्रश्न
When you move upstairs, do you perform some work?
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उत्तर
Yes, we perform work against gravity.
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संबंधित प्रश्न
Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.
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What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
A force can cause an object to change its ______.
