Quiz on Newton's Laws of Motion

What does Newton's First Law of Motion state?

• An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

• Whenever one object exerts a force on another object, the second object exerts an equal and opposite force on the first.

• The acceleration of an object depends on the mass of the object and the amount of force applied.

• The force of gravity acts between all objects in the universe.

What is inertia?

• The amount of matter in an object.

• The speed of an object in a particular direction.

• The force that pulls objects toward each other.

• The tendency of an object to resist changes in its state of motion.

According to Newton's Second Law, what does force equal?

• Mass times time

• Mass times velocity

• Mass times distance

• Mass times acceleration

What is a vector quantity?

• A quantity that has both magnitude and direction

• A quantity that has only direction

• A quantity that has neither magnitude nor direction

• A quantity that has only magnitude

Which of the following is an example of Newton's Third Law?

• The motion of an airplane when a pilot changes the throttle setting

• The motion of a ball falling down through the atmosphere

• The motion of lift from an airfoil

• The acceleration of a car when the gas pedal is pressed

What did Newton's laws together with Kepler's Laws explain?

• Why the Earth rotates on its axis

• Why the sky is blue

• Why objects fall to the ground

• Why planets move in elliptical orbits rather than in circles

What is the definition of momentum?

• Mass times velocity

• Force times time

• Mass times acceleration

• Force times distance

What happens when an external force is applied to an object with constant mass?

• The object will move in a circular path

• The object will remain at rest

• The object will accelerate

• The object will decelerate