Question on: WAEC Physics - 2002
Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance of 1.0m. Calculate the magnitude of the force of attraction between them. [G = 6.70 x 10-11Nm-2kg-2]
A
6.70 x 10-11N
B
6.70 x 10-10N
C
6.03 x 10-11N
D
6.03 x 10-7N
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Correct Option: D
F = (\frac{Gm_1m_2}{r^2} = 6.7 \times 10^{11} \times \frac{100 \times 90}{1^2} = 6.03 \times 10^{-7}N)
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