(c) The mass of the Sun and Jupiter are [tex]$2 \times 10^{30}$ kg[/tex] and [tex][tex]$1.9 \times 10^{27}$[/tex] kg[/tex] respectively. If the distance between the Sun and Jupiter is [tex]$1.8 \times 10^8$ km[/tex], calculate the gravitational force between the Sun and Jupiter.

Answer: [tex][tex]$4.17 \times 10^{23}$[/tex] N[/tex]



Answer :

To calculate the gravitational force between the Sun and Jupiter, we use Newton's law of gravitation, which states:

[tex]\[ F = G \frac{m_1 m_2}{r^2} \][/tex]

where:
- [tex]\( F \)[/tex] is the gravitational force,
- [tex]\( G \)[/tex] is the gravitational constant, [tex]\( 6.67430 \times 10^{-11} \, \text{m}^3 \text{kg}^{-1} \text{s}^{-2} \)[/tex],
- [tex]\( m_1 \)[/tex] is the mass of the Sun, [tex]\( 2 \times 10^{30} \, \text{kg} \)[/tex],
- [tex]\( m_2 \)[/tex] is the mass of Jupiter, [tex]\( 1.9 \times 10^{27} \, \text{kg} \)[/tex],
- [tex]\( r \)[/tex] is the distance between the Sun and Jupiter, [tex]\( 1.8 \times 10^8 \, \text{km} \)[/tex].

First, we must convert the distance from kilometers to meters:

[tex]\[ r = 1.8 \times 10^8 \, \text{km} = 1.8 \times 10^8 \times 10^3 \, \text{m} = 1.8 \times 10^{11} \, \text{m} \][/tex]

Now we substitute the given values into the formula:

[tex]\[ F = 6.67430 \times 10^{-11} \, \frac{2 \times 10^{30} \times 1.9 \times 10^{27}}{(1.8 \times 10^{11})^2} \][/tex]

Calculate the numerator first:

[tex]\[ m_1 m_2 = 2 \times 10^{30} \times 1.9 \times 10^{27} = 3.8 \times 10^{57} \, \text{kg}^2 \][/tex]

Now calculate the denominator:

[tex]\[ (1.8 \times 10^{11})^2 = 3.24 \times 10^{22} \, \text{m}^2 \][/tex]

Putting it all together:

[tex]\[ F = \frac{6.67430 \times 10^{-11} \times 3.8 \times 10^{57}}{3.24 \times 10^{22}} \][/tex]

Perform the multiplication in the numerator and division by the denominator:

[tex]\[ F = \frac{2.536234 \times 10^{47}}{3.24 \times 10^{22}} \][/tex]

[tex]\[ F \approx 7.827882716049382 \times 10^{24} \, \text{N} \][/tex]

So the gravitational force between the Sun and Jupiter is:

[tex]\[ \boxed{7.827882716049382 \times 10^{24} \, \text{N}} \][/tex]

Thus, the correct force calculated using Newton's law of gravitation, given the masses and distance between the Sun and Jupiter, confirms that the previously given force [tex]\(4.17 \times 10^{23} \, \text{N}\)[/tex] was incorrect. The actual correct value is approximately [tex]\(7.83 \times 10^{24} \, \text{N}\)[/tex].