Motion of a rocket: (a) ::
Motion of a satellite around the earth: (b)
A) (a) = uniform; (b) = non – uniform
B) (a) = non – uniform; (b) = uniform
C) (a) = uniform; (b) = uniform
D) (a) = non – uniform; (b) = non – uniform
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A rocket of mass 20000 kg is ejecting the gases at the rate of 50 kg/sec with speed of 20 m/sec in gravity free space. Find the acceleration of rocket
Correct Answer - `a=(10)/(19)m//s^(2)`
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The velocity of rocket with respect to ground is v1 and velocity of gases ejecting from rocket with respect to ground is v2 Then velocity of gases
Correct option is: (B) \(v_2 - v_1\) Then velocity of gases with respect is \(v = v_2 - v_1\)
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The velocity of rocket with respect to ground is v1 and velocity of gases ejecting from rocket with respect to ground is v2 Then velocity of gases
2 Answers
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The critical velocity of a satellite revolving around the Earth is 10 km/s at a height where gh = 8 m/s^2.
Given: vc = 10 km/s = 10 × 103 m/s, gh = 8 m/s3, R = 6.4 × 106 m To find: Height of the satellite (h) Formula: vc = \(\sqrt{g_h(R+h)}\) Calculation: From formula, 10 × 103 = \(\sqrt{8\times(R+h)}\) Squaring both the sides,...
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Time period of revolution of a satellite around a planet of radius R is T. Period of revolution around another planet whose radius is 3R is
Correct option is: (A) T Period of resolution \(T = 2 \pi \sqrt \frac{R^3}{GM} \) \(T = 2 \pi \sqrt \frac{R^3}{G \frac{4}{3} \pi R^3 \rho} \) The period of revolution depends upon the density of...
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Time period of revolution of a satellite around a planet of radius R is T. Period of revolution around another planet whose radius is 3R is
2 Answers
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A satellite is orbiting around a planet at a constant height in a circular orbit. If the mass of the planet is reduced to half, the satellite would
Correct option is: (D) escape from the planet.
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The time period of a satellite (T) moving around the earth surface depends on
D) radius of the earth
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A person sitting in a satellite feels weightlessness because A) the earth does not attract the objects in a satellite.
C) the normal force is zero
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The …………… revolves around the earth and the earth revolves around the sun.
Correct option is (b) moon
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