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-PS2-4

NGSS.MS-PS2-2

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