Question

Determine the gravitational force of two particle of mass $3kg$ and $7kg$ separated by a distance $2m$.

• A. $35\times {10}^{-11}N$
• B. $25\times {10}^{-11}N$
• C. $5\times {10}^{-11}N$
• D. $3.5\times {10}^{-11}N$

Answer 1

The correct option is A $35\times {10}^{-11}N$

Gravitational force of two particle of mass $3kg$ and $7kg$ separated by a distance $2m$ is given by:

$F=G\frac{Mm}{r^2}=6.674\times {10}^{-11}\times \frac{3\times 7}{2^2}=35\times {10}^{-11}N$