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A particle with total energy \(E\) is moving in a potential energy region \(U(x).\) The motion of the particle is restricted to the region where:
| 1. | \(U(x)<E\) | 2. | \(U(x)=0\) |
| 3. | \(U(x)\leq E\) | 4. | \(U(x)> E\) |
Subtopic: Â Conservation of Mechanical Energy |
Level 3: 35%-60%
NEET - 2013
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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?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â Conservation of Mechanical Energy |
 51%
Level 3: 35%-60%
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A ball is dropped from a height of \(5~\text {m}.\) If it rebounds up to a height of \(1.8~\text {m},\) then the ratio of velocities of the ball after and before the rebound will be:
1. \(\dfrac{3}{5}\)
2. \(\dfrac{2}{5}\)
3. \(\dfrac{1}{5}\)
4. \(\dfrac{4}{5}\)
Subtopic: Â Conservation of Mechanical Energy |
 78%
Level 2: 60%+
AIPMT - 1998
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