2.4 Air Resistance(Final)

What is air resistance?

• A form of friction that slows things down

• The force that pushes objects forward

• The force that pulls objects downward

• The force that lifts objects upward

Which factor affects air resistance?

• The weight of the object

• The color of the object

• The temperature of the object

• The speed of the object

How does streamlining reduce air resistance?

• By increasing the area in contact with the air

• By decreasing the area in contact with the air

• By changing the color of the object

• By increasing the weight of the object

What happens to air resistance when a skydiver opens his parachute?

• Air resistance decreases

• Air resistance increases

• Air resistance remains the same

• Air resistance becomes zero

Why do heavier objects fall faster than lighter ones on Earth?

• Because of gravity

• Because of air resistance

• Because of their mass

• Because of their color

How does the speed of an object affect air resistance?

• Objects moving at a higher speed experience more air resistance.
  

• Objects moving at a higher speed experience less air resistance
  

• Speed has no effect on air resistance
  

• Objects moving at any speed will stop experiencing air resistance

How does the shape of an object affect air resistance?

• Air resistance is less if the area in contact with the air is increased.

• Air resistance is less if the area in contact with the air is reduced.

• Shape has no effect on air resistance.

• Air resistance is the same regardless of the shape of the object.

Which of the following is an example of streamlining?

• Using a larger surface area to increase air resistance.

• Making an object more flat to reduce air resistance.

• Adding weight to increase air resistance

How does streamlining reduce air resistance?

• By changing the flow of air over an object.

• By increasing the weight of the object.

• By decreasing the speed of the object.

• By decreasing the area in contact with the air.

Why do streamlined cars use less fuel?

• Because they have larger engines.

• Because they have smaller fuel tanks.

• Because they experience less air resistance.

• Because they can travel at higher speeds.