The time period of a geo-stationary satellite is 24 h, at a height 6RE−RE is the radius of earth) from surface of earth. The time period of another satellite whose height is 2.5RE from surface will be
Held on 30 Apr 2019 · Verified 9 Jul 2026.
62 h
122 h
2.524 h
2.512 h
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A bullet of mass 10 g moving with 400 m/s penetrates a wall and comes to rest. The loss in kinetic energy is:
A body of mass 5 kg is moving with a velocity of 10 m/s. The kinetic energy of the body is:
The Sun rotates around its centre once in 27 days. What will be the period of revolution if the Sun were to expand to twice its present radius without any external influence? Assume the Sun to be a sphere of uniform density.
A sphere of radius $R$ is cut from a larger solid sphere of radius $2 R$ as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is: 
A ball of mass 0.5 kg is dropped from a height of 40 m . The ball hits the ground and rises to a height of 10 m . The impulse imparted to the ball during its collision with the ground is (Take $\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2$ )
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