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Which of the diagrams shown in the figure most closely shows the variation in kinetic energy of the earth as it moves once around the sun in its elliptical orbit?
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4. |  |
Subtopic: Â Conservation of Mechanical Energy |
 51%
Level 3: 35%-60%
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A body is falling freely under the action of gravity alone in a vacuum. Which of the following quantities remain constant during the fall?
| 1. | kinetic energy |
| 2. | potential energy |
| 3. | total mechanical energy |
| 4. | total linear momentum |
Subtopic: Â Conservation of Mechanical Energy |
 81%
Level 1: 80%+
Hints
A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen through a height (3/4)h. Which of the diagrams shown in Fig. 6.8 correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground?
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2. |  |
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4. |  |
Subtopic: Â Conservation of Mechanical Energy |
 81%
Level 1: 80%+
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