Question

What is the gravitational force between two trucks, each with a mass of 2.0 x 10^4 kg, that are 2.0m apart? (G=6.673 x 10^-11 N•m^2/kg^2)

Answer 1

Firs we will use the next formula

`F=G\text{ }\frac{m_1\cdot m^{}_2}{r^2}`

Where G is the gravitational force, m nd m2 are the masses and r is the distance between the masses

In our case

m1=m2= 2.0 x 10^4 kg

r= 2m

G=6.673 x 10^-11 N•m^2/kg^2

We substitute

`F=6.673*10^(-11)\cdot(2.0x10^4\cdot2.0x10^4)/(2^2)=0.0066743N=6.7*10^(-3)`

ANSWER

The gravitational force is 0.00667=6.7x10^-3N