Gravity & Friction

Friction is a force that acts in a(n) ___________ direction relative to a moving object.

• similar

• opposite

• parallel

• perpendicular

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.

• The marble’s speed would increase.

• The marble would stop immediately. 

• The marble would remain at a constant speed.

Tags

NGSS.MS-PS2-2

Two factors effecting the strength (magnitude) of the force of gravity between 2 objects are...

• mass and distance 

• mass and volume

• distance and weight 

• weight and mass

As mass increases, what happens to the gravitational force?

• It increases.

• It decreases.

• It stays the same.

• It acts as a 3rd degree derivative function.

Tags

NGSS.MS-PS2-4

As the distance between 2 objects increases, what happens to gravitational force?

• It increases.

• It decreases.

• It stays the same.

• Only Mr. Silvio knows what will happen.

Tags

NGSS.MS-PS2-5

An object is falling but it is not accelerating. What do you know?

• Gravity is stronger than air resistance.

• Air resistance is stronger than gravity.

• Air resistance is equal to gravity.

• The forces of air resistance and gravity are unbalanced.

Tags

NGSS.MS-PS2-4

Force between two surfaces that are sliding is known as

• magnetism

• friction

• electric force

• I don't know

If you kick a soccer ball, it goes up to a certain distance and stops. This happens due to

• gravity

• magnetism

• friction

• weight

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

On which surface would a ball move slowly?

• carpet

• marble floor

• wooden floor

• I don't know

Rough surfaces have

• more friction

• less friction

• same level of friction

• I don't know