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The escape velocity for a body projected vertically upwards from the surface of earth is 11 km/s. If the body is projected at an angle of 45o with the vertical, the escape velocity will be

(a)  ( 11/√2 )km/s                         (b) 11√2km/s

(c)   22 km/s                             (d)  11 km/s

Answer: d

(3)

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