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Help needed Physics (9702/04)May june 2003

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shiplu:
Heellooo I need help on CIE physics Paper4 May June 2003 Question Number 1b..and c part please...ASAP

astarmathsandphysics:
one mo

astarmathsandphysics:
b)Because gravity is attractive so acts to decrease the distance between the two object.
c)dV=-GM(1/r2-1/r1)=-6.67*10^-11*6*10^24*(1/(6.4*10^6+1.3*10^7)-1/(6.4*10^6)
=41.9*10^6 J/Kg

Notice I had to change to m 6.4*10^3km=6.4*10^6m

shiplu:
Thanks bro...btI guess part b answer is not enough because its of 3 mark....

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