Question

the space crafts must escape the earth's gravitational force to travel into the outer space.To achieve this the initial velocity of the moving object must be greater than_______
option:
a)11.2 km/s
b)11.1 km/s
c)11.2 m/s
d) 11.1 m/s​

Answer 1

Answer:

The escape velocity from earth is 11.2 km/s. If a body is to be projected in a direction making an angle 45∘∘ to the vertical, then the escape velocity is

AIPMTAIPMT 1993Gravitation

A

11.2×2km/s11.2×2km/s

7%

B

11.2km/s11.2km/s

66%

C

11.2/2–√km/s11.2/2km/s

17%

D

11.22–√km/s11.22km/s

10%