18. Newton's third law states that any action will have a (n) and reaction.
A equal and different
C. equal and similar
B. equal and opposite
D. greater and opposite
19. The forces involved in Newton's third law act.
A. in same direction
C. on different objects
B. on five bodies
D. on the same object
20. What is the second law of motion?
A. The state of motion of an object does not change as long as the net force acting on the object is 0.
B. The acceleration of an object is equal to the net force acting upon it divided by the object's mass.
C. Friction causes an object to slow down and affect the motion.
D. The measure of inertia relative to the object's mass is the object's acceleration​