Gravity and Friction

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

• similar
• opposite
• parallel
• perpendicular

What type of friction acts on an object that is not yet moving?

• Static
• Dynamic
• kinetic
• Rolling

The wheels on a moving skateboard most likely experience ____________.

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

As the child moves down the slide, they mostly experience the effect of ___________.

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

Tags

NGSS.MS-PS2-2

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

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

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

• mass and distance 
• mass and volume
• distance and weight 
• weight and mass

Tags

NGSS.MS-PS2-4

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-PS2-2

Is air resistance Friction?

• No

• Yes

is the resistance of motion when one object rubs against another

• Force

• Motion

• Gravity

• Friction