Friction, Air Resistance, Gravity

Multiple Select

The amount of sliding friction depends on which things?

• acceleration

• type of surface

• weight of the moving object

• the rotundness of the man on the pogo stick

Multiple Choice

The weight of an object varies with the:

• pull of gravity

• dimensions of the object

• volume of the object

Multiple Choice

Which of the following best describes two surfaces that are in contact with each other but are not in motion?

• kinetic friction

• static friction

Multiple Choice

The amount of friction depends on the weight of the objects pressing together.

• True
• False

Multiple Choice

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

Multiple Choice

Wheels of a shopping cart experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Multiple Choice

Wheels on a skateboard most likely experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Multiple Choice

Sally experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Multiple Choice

The upward force which is exerted against a falling object is

• gravity

• terminal velocity

• air resistance

• intertia

Multiple Choice

Complete the sentence.

It is not the difference in gravity that causes objects to fall at different speeds, it’s the difference in the amount of__________________.

• Gravity

• Mass

• Air resistance

Multiple Choice

If you jump out of an airplane, which two forces are acting on you?

• Gravity and friction

• Force and gravity

• Gravity and Air Resistance

Multiple Choice

When you drop a hammer and a feather on the moon what will happen? There is no air on the moon.

• They will hit at the same time

• The hammer will hit first

• The feather will hit first

Multiple Choice

Weight is a force that depends on mass and:

• friction

• gravity

• magnetism

• energy

Multiple Choice

The picture shows a force vector arrow pointing down. The best name for this downward force is:

• gravity

• drag

• buoyancy

• friction

Multiple Choice

On Earth, the acceleration due to gravity is constant. Without air resistance, objects will fall to the ground at the same acceleration.

• True

• False

Match

Match the following concepts with their correct units

• mass

• velocity

• acceleration

• distance

• Weight

kg

m/s

m/s2

m

N

• kg

• m/s

• m/s2

• m

• N

Multiple Choice

As mass increases, what happens to gravitational force?

• increases
• decreases
• stays the same
• i don't know

Multiple Choice

Which model has greater gravitational attraction (if any)

• Model A
• Model B
• Both Model A and Model B (same gravity)