What happens to a body when it is projected vertically upwards from the surface of the earth with a speed of 11200 m/s and why? Compare escape speeds of two planets of masses M and 4M and radii 2R and R respectively.
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Answer:11200 m/s = 11.2 km/s is the Escape Velocity for Earth.
Any object projected vertically upwards at this speed can escape the gravity of the Earth and reach into space.
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