Question

A sphere of mass 40 kg is attracted by another sphere of mass 15 kg with a force of 9.8*10^-7 N. Find the value of the universal gravitational constant if the centres
of spheres are 20 cm apart.​

Answer 1

Answer:

Given:

M1= 40kg

M2=15kg

F=9.8×10^-7N

r=20cm=20/100=0.2m

F=G×M1×M2/r^2

9.8×10^-7= G×40×15/(0.2)^2

9.8×10^-7= G× 600/0.04

9.8×10^-7×0.04/600 =G

G= 3.92×10^-8/600

G= 3.92×10^-8/ 6×(10)^2

G= 3.92×10^-8-2/6

G=3.92×10^-11/6

G= 6.56×10-11 Nm^2 Kg^-2

Step-by-step explanation:

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