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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
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
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