Questions
The escape velocity corresponding to a planet of mass M and radius R is 50 km/sec. If the planet's mass and radius were 4M and R respectively then the corresponding escape velocity would be
a
100 km/sec
b
50 km/sec
c
200 km./sec
d
25 km/sec
detailed solution
Correct option is A
The escape velocity ve is given byVe=2GMR⋅ So 50=2GMRIn second caseve′=2G(4M)R1/2=22GMR1/2=2×50=100km/secTalk to our academic expert!
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