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Class XI Physics Gravitation 4
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Question 1
The time period of a satellite of the earth is 5 hours. If the separation between the earth and the satellite is increased to 4 times the previous value, the new time period (in hours) will be
Question 2
Two artificial satellites whose masses are m1 and m2 are moving in circular orbits of radii r1 and r2 respectively if r1 > r2 then which of the following statements is true about the speeds v1 and v2 of the satellites?
Question 3
A particle is fired vertically from the surface of the earth with a velocity KVe, where Ve is the escape velocity and K< 1. Neglecting air resistance, the height to which it will rise from the surface of the earth (R = radius of the earth) is
Question 4
In a gravitational field, at a point, where the gravitational potential is zero. Then-
Question 5
Gravitational potential due to a mass distribution is given by V = (x2y + y2z) . The gravitational field can be expressed as
Question 6
The weight of an object in the coal mine, sea level, at the top of the mountain are W1, W2 and W3 respectively, then-
Question 7
The diameters of two planets are in ratio 4 : 1. Their mean densities have ratio 1 : 2. The ratio of 'g' on the planets will be-
Question 8
The escape speed for a projectile in the case of earth is 11.2 km/sec. A body is projected from the surface of the earth with a velocity which is equal to twice the escape speed. The velocity of the body when at infinite distance from the centre of the earth is,
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Aug 25NEET & AIIMS
