Friction And Air Resistance

1. What is friction?

• 1. A force that helps objects move faster

• 1. A force that opposes motion

• A force that only exists in liquids

• A force that only affects flying objects

Which of the following is NOT an example of friction?

• Rubbing your hands together to warm them

• A ball rolling down a hill

• Gravity pulling an object towards the Earth
  

• Sliding across a wooden floor in socks

What is air resistance?

• The force of air pushing objects upward

• The force of air opposing the motion of objects through it

• The force that creates wind

• The force that makes airplanes fly

How does increasing an object's speed typically affect air resistance?

• Air resistance decreases

• Air resistance stays the same

• Air resistance increases

• Air resistance disappears completely

Which shape experiences the least air resistance?

• A flat surface

• A cube

• A sphere

• A parachute

What is the main purpose of a parachute?

• To eliminate air resistance

• To increase air resistance and slow descent

• To create friction with the ground

• To make the jumper fall faster

How does friction affect the motion of a sliding object?

• It makes the object move faster

• It has no effect on the object's motion

• It slows the object down

• It makes the object change direction randomly

Tags

NGSS.MS-PS2-2

Which surface would likely create the MOST friction for a sliding box?

• Ice
  

• Polished marble

• Rough concrete
  

• Waxed floor

In everyday life, why do we sometimes WANT friction?

• To make objects float in the air

• To help us grip and hold onto things

• To make everything super slippery

• To increase air resistance

How can air resistance be reduced on a car?

• By making the car heavier

• By driving the car slower

• By making the car's shape more streamlined

• By increasing the size of the car

Tags

NGSS.MS-PS2-1