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प्रश्न
Mention whether work is done or not in the following activity.
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | |
| 2. | Holding a doll | |
| 3. | Sitting in a bus | |
| 4. | Pushing a wall | |
| 5. | Digging soil |
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उत्तर
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | Work done |
| 2. | Holding a doll | Not done |
| 3. | Sitting in a bus | Not done |
| 4. | Pushing a wall | Not done |
| 5. | Digging soil | Work done |
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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?
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
