b) same
c) you need the mass of the earth (5.98e24)
g = GM/r^2
Solve for r
a man has a mass of 80,0 kg is standing on the surface of the earth.
a )calculate the magnitude of the attractive force (gravity) that the earth exerts on the man.(784n)
b)how does your answer in a) compare to the magnitude of the force that the man exerts on earth?
c)use your answer I a) to caculate the radius of the earth
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