G8 Ch2 L2 Newton's 1st law

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

The tendency of an object to resist a change in its motion

• acceleration
• inertia
• mass
• frame of reference

Balanced or unbalanced?

• balanced
• unbalanced

__________ is the sum of all forces acting on an object. It is capable of accelerating a mass. 

• velocity
• gravity
• net force
• distance

What is the net force?

• 20 N 
• 0 N 
• 400 N 
• 40 N 

What kind(s) of objects have inertia?

• all objects with mass
• only objects at rest
• only objects in motion
• only objects whose motion is being changed

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

If an object is not moving the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

An object need a balanced force for the object to move. 

• True
• False

Why do we have to wear seatbelts?

• Inertia

• Gravity

• Force