Question

The ratio of escape velocity of a tennis ball to that of a basket ball on the surface of the earth is

• A. 1:1
• B. 1:2
• C. 2:1
• D. 4:1

Answer 1

The correct option is A 1:1

Equating KE and PE we get the expression for escape velocity as $\sqrt{2GM/r}$, where M = mass of earth , r = radius of earth and G = gravitational constant. ince escape velocity is independent of mass of ball, the ratio of escape velocity of a tennis ball to that of a basket ball on the surface of the earth is 1:1.