Laws of Motion Terms & Units

What units can force be expressed in?

• kg-m/sec
• kg-m/sec²
• Newtons or kg-m/sec
• Newtons or kg/msec²

What is force?

• Mass in motion
• An object's resistance to a change in motion
• A push or a pull that changes an object's velocity

What is inertia?

• A push or a pull that changes an object's velocity
• An object's resistance to a change in motion
• Mass in motion

What is momentum?

• A push or a pull that changes an object's velocity
• Mass in motion
• An object's resistance to a change in motion

What unit is momentum expressed in?

• kg-m/sec
• kg-m/sec²
• Newtons
• Newtons or kg-m/sec²

What does an object's inertia depend on?

• Mass
• Mass & Speed
• Mass & Acceleration

When two moving objects collide,who will get pushed back?

• Object with less momentum gets pushed back
• Object with more momentum gets pushed back

According to Newton's 2nd law, if an object's mass is DOUBLED, what would happen to its acceleration (if the same force is pushing it?)
*Note: NOT a falling object!

• It's acceleration would increase
• It's acceleration would decrease
• There would be no change in its acceleration.

According to Newton's 2nd law, if force is INCREASED, what will happen to acceleration?

• Acceleration would decrease with more force
• Acceleration would increase with more force

What unit is acceleration expressed in when using Newton's 2nd law?

• kg
• m/sec
• m/sec²
• Newtons