Calculate the gravitational force between 2 stars having mass 10- 25 kg and 5 - 10- 30 kg respectively- Distance between them is 2 - 10- 10 m-

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Standard IX

Physics

Moon's Revolution around Earth

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Question

Calculate the gravitational force between 2 stars having mass $10^{25} k g$ and $5 \times 10^{30} k g$ respectively. Distance between them is $2 \times 10^{10} m$ .

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Solution

According to universal law of gravitation,
$F = G \frac{M_{1} M_{2}}{R^{2}}$
where:
F = gravitational force
G = gravitational constant
$M_{1}$ =mass of star 1
$M_{2}$ =mass of star 2
R=distance from star 1 to star 2
$F = 6.673 \times 10^{- 11} \times \frac{10^{25} k g \times 5 \times 10^{30} k g}{(2 \times 10^{10} m)^{2}} = 8.34125 \times 10^{24} N$ .

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Calculate the gravitational force between 2 stars having mass 1025 kg and 5×1030 kg respectively. Distance between them is 2×1010m.

According to universal law of gravitation,F=GM1M2R2 where: F = gravitational force G = gravitational constantM1=mass of star 1M2=mass of star 2 R=distance from star 1 to star 2F=6.673×10−11×1025kg×5×1030kg(2×1010m)2=8.34125×1024N.

Calculate the gravitational force between 2 stars having mass $10^{25} k g$ and $5 \times 10^{30} k g$ respectively. Distance between them is $2 \times 10^{10} m$ .