Friction Forces

Which of the following is not an example of a vector?

• velocity

• force

• displacement

• speed

A force is required to change the velocity

of an object.

• True

• False

Tags

NGSS.HS-PS2-1

The maximum amount of static friction between a piece of furniture and the floor is 500 N. Which of the following actions would cause the furniture to remain unmoved? Select all that apply.

• Pushing on the chair with 600 N of force to the chair from the right

• Pushing on the chair with 450 N of force to the chair from the right

• Pushing on the chair with 450 N of force to the chair from the right

• Pushing on the chair with 600 N of force to the chair from the left

Tags

NGSS.MS-PS2-2

A train traveling at a constant speed of 75 mph can be experiencing balanced forces.

• True

• False

Tags

NGSS.MS-PS2-2

A basketball will eventually roll to a stop on a court because

• it encounters friction with air molecules.

• the court applies an unbalanced force that slows it down.

• it encounters rolling friction.

• friction works in the direction opposite of the basketball's motion.

Tags

NGSS.MS-PS2-2

A car slowing to a stop is not accelerating.

• True

• False

Which of the following is not an example of kinetic friction?

• rolling friction

• sliding friction

• static friction

• fluid friction

For friction to increase, the objects must be pushed together with less force.

• True

• Not true

Objects like a motorcycle that move on wheels experience

• rolling friction.

• sliding friction.

• static friction.

• fluid friction.

There is usually less friction involved with rolling friction compared to sliding friction.

• True

• Not even close to being true.