Concept explainers
Answer the following question with the correct letter.
1. Which law has this statement? “The sum of the forces (F) on an object is equal to the mass (m) of that object multiplied by the acceleration (a) of the object”.
a. First Law
b. Second Law
c. Third Law
d. Law of Gravitation
2. Which law has this statement? “When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body”.
a. First Law
b. Second Law
c. Third Law
d. Law of Gravitation
3. A physical quantity related to the property of an object to resist changes in its motion.
a. Inertia
b. Acceleration
c. Mass
d. Force
4. True or false? In considering forces in systems, their direction is not important.
a. True
b. False
5. An object following a straight-line path at constant speed <blank>.
a. Has net force acting upon it in the direction of motion
b. Has zero acceleration
c. Must be moving in a vacuum
d. Has no forces acting on it
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