Understanding Friction and Air Resistance

What is friction?

• A force that helps objects move faster

• A force that opposes motion

• A type of energy

• A type of material

Which surface exerts more friction?

• A smooth surface

• A rough surface

• A wet surface

• A shiny surface

What is the purpose of oil in a car engine?

• To increase friction

• To decrease friction

• To make the engine heavier

• To cool the engine

What is air resistance also known as?

• Air friction

• Air pressure

• Air flow

• Air speed

What does air resistance do to falling objects?

• Speeds them up

• Slows them down

• Changes their color

• Makes them heavier

What does air resistance depend on?

• The mass of an object

• The color of an object

• The speed, shape, and orientation of an object

• The temperature of an object

Why are planes streamlined?

• To increase air resistance

• To reduce air resistance

• To make them heavier

• To change their color

What is the effect of a parachute on air resistance?

• It decreases air resistance

• It increases air resistance

• It has no effect on air resistance

• It changes the color of air

Which of the following is NOT a factor affecting air resistance?

• Speed of the object

• Shape of the object

• Mass of the object

• Orientation of the object

What happens to a fast-moving object in terms of air resistance?

• It experiences less air resistance

• It experiences more air resistance

• It experiences no air resistance

• It changes direction