Force and Motion Review

Why do we need friction?

• It helps objects go faster. 
• It helps objects go up higher.
• It helps make objects go slower or stop.

What are EQUAL forces acting on an object in opposite directions that do not change the object's motion?

• Friction
• Weight
• Balanced Forces
• Unbalanced Forces

The force that two surfaces exert on each other when they rub against each other.

• Friction
• Gravity
• Weight
• Force

If an object does not move at all, what does that mean about the forces acting on the object? 

• The forces are balanced. 
• The forces are unbalanced. 

Tags

NGSS.HS-PS2-1

What are UNEQUAL forces acting on an object in opposite directions that cause motion?

• Balanced Forces
• Unbalanced Forces
• Gravity

Tags

NGSS.MS-PS2-2

What does this graph represent?

• Constant speed
• Acceleration
• Not moving

Tags

CCSS.8.EE.B.5

A push or pull that can change the position or motion of an object/material is --

• magnetism

• motion

• force

Tags

NGSS.3-PS2-1

Friction is the _________

• force of attraction that causes a magnetic material to move

• force that acts in an opposite directions to movement

• act of applying force in order to move something away

What is the net force on the object, and which direction will the object move?

• 18 N to the right 
• 2 N to the right 
• 18 N to the left 
• 2 N to the left 

Tags

NGSS.MS-PS2-2

Inertia is...

• for every action, there is an equal and opposite reaction

• larger objects take more force to move

• an object in motion tends to stay in motion unless acted on by an opposite force

• a push that acts in the opposite direction and it slows down