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To what radius would the earth have to be shrunk, with no loss of mass, so that the escape speed from the surface of the earth is 50 km.h-1
50kmh-1 = 13.9 m/s
v=sqrt(2GM/r)
G=6.67 x 10^-11
M=5.98 x 10^24
r=???
13.9=sqrt(7.98 x 10^14/r)
193.21=7.98 x 10^14/r
193.21r=7.98 x 10^14
r=7.98 x 10^14/193.21
r=4.13 x 10^12
50kmh-1 = 13.9 m/s
v=sqrt(2GM/r)
G=6.67 x 10^-11
M=5.98 x 10^24
r=???
13.9=sqrt(7.98 x 10^14/r)
193.21=7.98 x 10^14/r
193.21r=7.98 x 10^14
r=7.98 x 10^14/193.21
r=4.13 x 10^12