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3. The work done by a force is given by the area of __ 4.The escape velocity for a body projected vertically upwards from the surface of the Earth is 11 km/s.If the body is projected at an angle 45 degree with the vertical the escape velocity will be.
Answer (1)
Hi,
11km/s.
Escape speed of a body from Earth's surface is given by: vmin = 2gR. This expression is obtained by conservation of energy and doesn't involve in which direction the body is thrown/projected. So, irrespective of the angle of projection, escape speed of the body from Earth's surface remains constant i.e. ≈11 km/s
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