Question

1. Two very large cruise ships each have a mass of 415 000 tonnes. If they were docked side by side, 1.0 m apart, their centres would be 60 m apart. What is the force of gravitational attraction putting them together? (Hint: 1 tonne = 1000 kg)

Answer 1

$$F=(6.67\cdot10^{-11})\frac{(4.15\cdot10^8)^2}{60^2}=3191\ N$$