Question

Two large boulders are 8.5 m apart.one boulder has a mass of 3600 kg and the other rock has a mss of 2850 kg find the gravitational force betweeen them

Answer 1

$9.47 \times 10^{-6}\; \text{N}$.

Explanation

Constant of universal gravitation:

$G = 6.67 \times 10^{-11} \;\text{m}^{3} \cdot \text{kg}^{-1} \cdot \text{s}^{-2}$.

Apply Newton's law of universal gravitation:

$F = \dfrac{G \cdot m_1 \cdot m_2}{r^{2}} =\dfrac{6.67 \times 10^{-11}\times 3600 \times 2850}{8.5^{2}} = 9.47 \times 10^{-6} \;\text{N}$.