Question

A rocket of mass 3 × 106 kg takes off from a launching pad and acquires a vertical velocity of 1km/s at altitude of 25km. Calculate ratio of kinetic energy & potential energy

Answer 1

Explanation:

k.E = 1/2mv^2

= 1/2x3x106x1000

= 159000

P.E = mgh

= 3x106x10x25 ( for simplicity taking value of g = 10)

ratio of k.E and P.E = 1/2x3x106x1000/ 3x106x10X25

= 2:1