NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1960 - 1963 of 2142
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Question number: 1960
» Gravitation » Energy
Question
With what velocity must a body be thrown upward form the surface of the earth so that it reaches a height of 10 R e? Mass of earth M = 6 ⨯ 10 24 kg, radius R e = 6.4 ⨯ 10 6 m and G = 6.67 ⨯ 10 -11 N-m 2 /kg 2.
Choices
| Choice (4) | Response | |
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| a. | 10.7 ⨯ 10 3 m/s |
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| b. | 10.7 ⨯ 10 5 m/s |
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| c. | 10.7 ⨯ 10 4 m/s |
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| d. | 1.07 ⨯ 10 4 m/s |
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Question number: 1961
» Gravitation » Energy
Question
The masses and the radius of the earth and the moon are M 1, M 2 and R 1, R 2 respectively their centers are at distance d apart. The minimum speed with which a particle of mass m should be projected form a point midway between the two centers so as to escape to infinity will be
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Question number: 1962
» Rotational Motion » Moment of Inertia
Question
Two discs of the same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio of,
Choices
| Choice (4) | Response | |
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| a. | 1: 3 |
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| b. | 1: 9 |
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| c. | 1: 81 |
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| d. | 1: 27 |
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Question number: 1963
» Rotational Motion » Moment of Inertia
Question
A circular disc of radius R and thickness has moment of inertia I about an axis passing through its center and perpendicular to its plane. It is melted and recanted into a solid sphere. The moment of inertia of the sphere about one of its diameters as an axis of rotation will be
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