The mass of Earth is 5.98x10^24kg and the Moon's mass is 7.35*10^22kg. The two objects are separated by a distance of 3.84x10^9m. What is the velocity of the Moon around the Earth?
What is the period of the Moon around the Earth?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground. what is his gravitational potential energy above the ground?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical