Another name for Newton's 1st law.
What is Inertia?
The formula for Newton's 2nd law of motion.
What is F=ma?
To every action there is an equal and opposite reaction. This is another word for action.
What is force?
Why do dishes stay on a table when a tablecloth is pulled off of the table?
The inertia of the plate resists change of motion. Not enough force to change motion.
Mass is the same thing as weight. (true or false)
What is false.
An object will stay at rest (or in motion) until...
What is acted on by an unbalanced force
When an object changes velocity or direction.
What is accelerate?
The reaction force (or force pair) to a hammer putting force on a nail.
What is a nail putting force to the hammer?
A volleyball player hits a volleyball with her forearms and it bounces off.
What is Newton's 3rd Law of Motion?
The resistance of an object to any change in motion is called...
What is inertia?
This causes an object to change velocity or direction.
What is an unbalanced force?
All of the matter in an object.
What is mass?
The gravitational force that Earth exerts on the moon compared to the gravitational force the moon exerts on Earth.
What is equal or the same?
Two children on a sled go faster than one child on a sled.
What is Newton's 2nd Law of Motion?
A car is driving at a constant speed of 50 mph while another car is driving at a constant speed of 90 mph. Which car is accelerating faster?
What is neither car is accelerating?
An object that has inertia will move at this rate.
What is a constant speed.

A semi-truck and a Mini Cooper are racing. Which one will get to 60 mph first? Why?
The Mini Cooper will accelerate faster because it has less mass.
Mr. Davis runs into a wall. The force that Mr. Davis puts on the wall is equal to the force that the wall puts on Mr. Davis. This is why Mr. Davis bounces off the wall and the wall doesn't move.
What is Mr. Davis has a smaller mass?
Why does a satellite keep going around Earth at a constant speed without stopping?
What is Newton's 1st Law of Motion? (or inertia)
This is why a person on Earth doesn't fly away when we push a button or turn a doorknob.
What are gravity and friction?

Why does the semi-truck take longer to stop than the Mini Cooper?
The semi-truck has more mass, so it has more inertia. So, it resists a change in motion more. It will take a greater force to stop it.

At the end of a race between a semi-truck and a Mini Cooper, which one will take more force to stop? Why?
The semi-truck because it has more mass so it will take more force to accelerate it to a stop.
Give an example of Newton's 3rd law of motion.
Any example that shows one object exerting a force on another object in an equal and opposite direction.
Why the astronaut was repelled by the spaceship when he pushed on it.
What is Newton's 3rd law of Motion?
If I change the mass of an object, then the force of that object will change because F=ma. What is the independent variable?
Changing the mass.