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Physics
Physics
Problem
Which one of the following expressions gives the escape velocity
v
e
v_e
v
e
from the surface of a planet of mass
M
M
M
and radius
R
R
R
? a)
v
e
=
G
M
R
v_e = \sqrt{\dfrac{GM}{R}}
v
e
=
R
GM
b)
v
e
=
G
M
2
R
v_e = \sqrt{\dfrac{GM}{2R}}
v
e
=
2
R
GM
c)
v
e
=
2
G
M
R
v_e = \sqrt{\dfrac{2GM}{R}}
v
e
=
R
2
GM
d)
v
e
=
4
G
M
R
v_e = \sqrt{\dfrac{4GM}{R}}
v
e
=
R
4
GM
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