Two uniform, 75.0-g marbles 2.00 cm in diameter are stacked as shown in ?Fig. P11.75 in a container that is 3.00 cm wide. (a) Find the force that the container exerts on the marbles at the points of contact A, B, and C. (b) What force does each marble exert on the other?

NEWTON’S SECOND LAW ● an object’s change in motion (acceleration) is directly proportional to applied force ● an object’s change in motion (acceleration) is inversely proportional to the object’s mass ● mass is just a measure of inertia, an object’s stubbornness or resistance to change in its motion ● a = f/m ● mass is a property of the object ● force is an outside influence on the object ● weight is an example or special case of force ● this is why everything falls alike = all objects have the same law of weight/mass