Physics Quiz: Newton's Third Law, Terminal Velocity, and Drag Force

What is Newton's third law of motion?

• For every action, there is no reaction

• For every action, there is an equal and opposite reaction.

• For every action, there is a greater reaction

• For every action, there is a smaller reaction

When a force is exerted on an object, according to Newton's third law, what is the reaction?

• An equal and opposite force is exerted by the object on the first force.

• The reaction force is always greater than the initial force

• The object exerts a force in the same direction as the first force

• The object exerts no reaction force

What is terminal velocity?

• The maximum speed of a rocket

• The speed of light in a vacuum

• The speed at which a car travels on a highway

• Constant speed reached by a falling object

What factors affect the terminal velocity of an object?

• Mass, surface area, and air resistance

• Density, volume, and pressure

• Color, shape, and temperature

• Velocity, acceleration, and force

What is air resistance?

• The force that opposes the motion of an object through the air.

• The force that propels an object through the air.

• The force that attracts objects to each other in the air.

• The force that causes objects to change color in the air.

How does air resistance affect the motion of an object?

• It has no effect on the motion of the object.

• It causes the object to change direction.

• It slows down the motion of the object.

• It speeds up the motion of the object.

What is drag force?

• A force that only affects the motion of an object in a vacuum

• A force that has no effect on the motion of an object through a fluid

• A force that opposes the motion of an object through a fluid

• A force that accelerates the motion of an object through a fluid

How is drag force related to the velocity of an object?

• Inversely proportional to the velocity

• Directly proportional to the velocity

• Directly proportional to the square of the velocity

• Not related to the velocity

What are the two factors that affect the magnitude of the drag force on an object?

• Velocity and shape

• Temperature and size

• Material and density

• Color and weight

Explain the concept of action and reaction forces in the context of Newton's third law.

• Action and reaction forces have no relationship to each other.

• Action and reaction forces are equal in magnitude and opposite in direction.

• Action and reaction forces are equal in magnitude and same in direction.

• Action and reaction forces only occur in non-contact situations.