Friction Forces

The force of gravity acting on an object is the object's ______.

• Mass
• Matter
• Weight 
• Terminal velocity 

Tags

NGSS.MS-PS2-4

You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.

• 20N 
• 40N 
• 10N 
• 70N

Tags

NGSS.MS-PS2-1

Friction is an example of _____________

• contact force

• non contact force

• both of these

• none of these

The rouugher the surface, the faster an object will travel over the surface

• true

• false

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

• false

• true

Rough surfaces have _________

• greater friction

• less friction

• the same level of friction

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

Which of the following answers is the most scientific answer for the question:

What is friction?

• The random force between two solids, liquids, or gases.

• The contact force between two solids, liquids, or gases that slide past one another.

• The thing that creates static electricity

• A force that is random

On which surface will a toy car travel the furthest?

• Carpet
• Polished Wood
• Ice

Tags

NGSS.MS-PS2-2

Which of the following statements is false?

• Friction can only slow things down

• Friction is never useful

• Friction can stop things from moving