Question

2. Two spherical objects with radii 1 m have masses of 1.5 kg and 8.5 kg. They are separated by adistance of 18 m. Find the gravitational attraction between them.r= 1 m

Answer 1

To find the gravitational force between the objects we use Newton's gravitaional law.

`F=G(m_1m_2)/(r^2)`

where G is the gravitational constant, m1 and m2 are the masses and r is the distance between the center of gravity of objects.

In this case, assuming the separation between the objects is at the border, the value of r is 20 m.

Then we have:

`\begin{gathered} F=6.6743*10^(-11)\cdot((8.5)(1.5))/((20)^2) \\ =2.127*10^(-12) \end{gathered}`

Therefore the gravitational force between the objects is:

`2.127*10^(-12)\text{ N}`