Newton's First Law

Newton's 1st Law is also called the Law of ...

• Friction

• Inertia

• Unbalanced forces

• Newtons

An object in motion tends to stay in motion unless an ___ force acts on it.

• unbalanced
• balanced

The tendency of an object to resist a change in motion is...

• inertia
• kinetic energy
• vector
• net force

Because of inertia, a moving object will keep ________ unless acted on by an unbalanced force.

• at rest

• moving

• in one spot

• inertia

Because of inertia, a resting object will remain at ________.

• rest
• a constant speed
• school
• inertia 

An object following a straight-line path at a constant speed 

• has zero acceleration
• has no forces acting on it
• has a net force acting in the direction of motion
• none of these

If a hockey puck slides on a frictionless force it will eventually slow down because of its inertia.

• True
• False

Objects at rest remain at rest and objects traveling at a steady rate in a straight line continue that way until a _________acts on them.  

• force
• velocity
• inertia
• acceleration 

Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

If there are two forces going in the same direction how would you find the net force?

• Subtract
• Add
• Neither
• Multiply