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Physics help A2

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nid404:
The second question. At 4.7*10^6 m frm the centre of the earth. the gravitational pull on any objects would be 0 apparently.

So.

GM/ (4.7*10^6)2= GM2(mass of the moon)/ (384.4*10^6 - 4.7*10^6)2

You get M2.

I don't get the second half of this one either :\

sizbeauty:
hehe itz ok!!  ;D
i ll let u knw de scnd part of both dese ques if i becum smart enough to get thm frm ma teacher'z xplanation!! :P
thanx alot once again!! :)

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