Which of the following expresses a principle, which was initially stated by Galileo and was later incorporated into Newton's laws of motion?
a. An object's acceleration is inversely proportional to its mass.
b. For every action there is an equal but opposite reaction.
c. The natural condition for a moving object is to remain in motion.
d. The natural condition for a moving object is to come to rest.
Question 2
If we know an object is moving at constant velocity, we may assume:
a. the net force acting on the object is zero.
b. there are no forces acting on the object.
c. the object is accelerating.
d. the object is losing mass.