Newton's Laws of Motion

Which is true?

• An object in motion will stay in motion.

• An object in motion wants to rest.

Newton's First Law of Motion deals with what key concept?

• Inertia.

• Gravity.

What is inertia?

• When an object is attracted to another object creating a pull on that object.

• The tendency to resist change in motion.

How does a football kicked in the air demonstrate inertia?

• The football wants to stay in motion but cannot because the kicker did not use enough force.

• It wants to stay in motion but cannot since an outside force such as air friction and gravity act upon it.

What affects an objects inertia?

• The shape of the object.

• The mass of the object.  

What happens to the inertia of an object when it's mass is increased?

• It has a greater amount of inertia which requires a larger force to move it.

• It has lesser amount of inertia which requires a smaller force to move it.

A golf ball has a small mass. A bowling ball has a large mass. With the same force, which will accelerate (increase speed) more?

• golf ball

• bowling ball

What formula represents Newton's Second Law of Motion?

• Force = mass times acceleration

• Speed = distance divided by time.

How does the hammer hitting the piggy bank represent Newton's Second Law of motion?

• The hammer has a greater mass and acceleration therefore exerts a greater force on the piggy bank causing it to break.

• The piggy bank has a greater mass which resists the acceleration from the hammer.

What best describes Newton's Third law of motion?

• An object as rest stays at rest and an object in motion stays in motion unless acted upon by an outside force.

• For every action there is an equal and opposite reaction.

• Force = mass times acceleration.