Q. The mass of the Moon is 7.35 x10^22 kg, while that of the Earth is 5.98 x10^24 kg. The average distance from the center of the Moon to the center of the Earth is 384400 km. What is the size of the gravitational force that the Earth exerts on the Moon?
Q. What average force is needed to accelerate a 9.00-gram pellet from rest to 150 m/s over a distance of 0.900 m along the barrel of a rifle?