Newton's Laws

What law is best described by inertia?

• 1st
• 2nd
• 3rd
• law of conservation of mass

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• The Law of Inertia (1st law)
• The Law of Acceleration (2nd law)
• The Law of Conservation of Momentum
• Action Reaction Law (3rd 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 

A 20 kg bike accelerates at 10 m/s2.  what was the force

• 25 Newtons
• 20 Newtons
• 200 Newtons
• 10 Newtons

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar
• Equal and opposite
• Equal and different
• Greater and opposite

You hit a wall with a stick.  The equal but opposite reaction is _____

• the wall pushes against you
• the stick pushes against you
• you push against the stick
• the wall pushes against the stick

The nozzle of a rocket is pointed downward so that, as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?

• The rocket is protected from the heat of the exhaust.

• Burned fuel can be collected on the ground.

• As exhaust pushes down, the rocket is pushed up

• This allows the rocket to be steered properly.

If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?

• Force

• Acceleration

• Mass

• Newton's 2nd Law

what is inertia??

• the mass of an object

• the tendency of an object to continue doing what it is doing

• the opposing force of gravity

• another name for unbalanced forces