What is the most important safety rule to remember during lab activities

Which two objects have the greatest gravitational force acting between them

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply