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Question

The escape velocity on the moon is:
a) 5.64x10^6 m/s
b) 1.68x10^3
c) 160 m/s
d) 2.38x10^3 m/s
11 years ago

Answers

Damon
potential energy of mass m at surface = -GMmoon m/r

= - m (6.67*10^-11) (7.35*10^22) /(1.74*10^6)
= m (28.2*10^5)

Needs that many Joules of Ke so
(1/2) m v^2 = 2.82*10^6 m

v^2 = 5.64 *10^6
v = 2.37*10^3 = 2370 m/s
by the way:
http://www.1728.org/escvel.htm
11 years ago
Liz
thanks! and thanks for the link, its quite useful!
11 years ago

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