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What is the minimum escape velocity of rocket to be launched into space ?
- a)5 Km/Sec.
- b)6 Km/Sec.
- c)11 Km/Sec.
- d)15 Km/Sec.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What is the minimum escape velocity of rocket to be launched into spac...
On the surface of the Earth, the escape velocity is about 11.2 kilometers per second (~6.96 mi/s), which is approximately 34 times the speed of sound (Mach 34) and several times the muzzle velocity of a rifle bullet (up to 1.7 km/s). However, at 9,000 km altitude in “space”, it is slightly less than 7.1 km/s. In physics, escape velocity is the speed at which the kinetic energy plus the gravitational potential energy of an object is zero. It is the speed needed to “break free” from a gravitational field without further propulsion. A rocket moving out of gravity well does not actually need to attain escape velocity to do so, but could achieve the same result at any speed with a suitable mode of propulsion and sufficient fuel. Escape velocity only applies to ballistic trajectories.
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