Question

A sphere of mass 40 kg is attracted by another sphere of mass 80 kg by a force of 2.5*10^-6N. When their centres are 30mm apart, find G.

Answer 1

firstly we have to convert mm into m

as formula of G is

G=Fr²/m1m2

m1×m2=2400kg

r²=0.03m

so

G=(2.5×10∧-6)(0.03)²/2400

G=9.375×10∧-13