4. Frictional forces

What is friction?

• A force that causes sliding motion
• A force that promotes sliding motion
• A force that has no effect on sliding motion
• A force that opposes sliding motion

Which of the following is an example of static friction?

• Two surfaces sliding past each other
• A parked car on a hill
• A rolling object interacting with a surface
• An airplane flying through air

What are the different types of friction?

• Static, kinetic, rolling, and fluid
• Static, kinetic, sliding, and rolling
• Static, sliding, and fluid
• Kinetic, sliding, and fluid

Which of the following is an example of rolling friction?

• An airplane flying through air
• An object sliding across a surface
• A rolling object interacting with a surface
• Fish fighting against water resistance

Which of the following is an example of fluid friction?

• Fish fighting against water resistance
• Two surfaces sliding past each other
• An object sliding across a surface
• A parked car on a hill

Which of the following is not a type of friction?

• Fluid friction
• Kinetic friction
• Static friction
• Magnetic friction

What is the role of friction in keeping objects stationary?

• It has no effect
• It plays a minor role
• It plays a key role
• It causes objects to move

Which of the following is an example of kinetic friction?

• Two surfaces sliding past each other
• A parked car on a hill
• An object sliding across a surface
• An airplane flying through air

Which of the following statements is true about tire importance in transportation?

• Tires have no effect on safety
• Different types of tires are needed for different vehicles
• Tires are only important for aesthetics
• All vehicles use the same type of tire

Tags

NGSS.MS-PS2-2

Which of the following experiences fluid friction while in motion?

• An object sliding across a surface
• A parked car on a hill
• Two surfaces sliding past each other
• Airplanes flying through air

Tags

NGSS.MS-ESS2-5