An astronaut takes a ball of mass from earth to space
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
An astronaut takes a ball of mass m from earth to space. He throws the ball into a circular orbit about earth at an altitude of 318.5 km. From earth's surface to the orbit, the change in total mechanical energy of the ball is x21ReGMem. The value of x is (take Re=6370 km):
(1) 11
(2) 9
(3) 12
(4) 10