Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance...

WAEC 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 Answer: Option D

Explanation

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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Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance...

Correct Answer: Option D

Explanation

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