Test your knowledge
Who created the three laws of motion
Isaac Newton
What is a force?
A push or pull
Why do you move forward when a car stops suddenly?
Inertia
What is inertia?
Resistance to changes in motion
What is Newton's first law also called?
The law of inertia
How many laws of motion did Newton create?
Three
What is friction
A force that opposes motion
Why does a soccer ball eventually stop rolling?
Friction
which has more inertia: a truck or a bicycle?
A truck
What does Newton's first law explain?
How objects move or stay still
Does an object need a force to keep moving at constant velocity?
No
What is a balanced force?
Forces that cancel each other out.
Why does a book stay on a table?
No unbalanced force moves it
What determines how much inertia an object has?
Its mass
What happens to an object at rest if no net force acts on it.
It stays at rest
What is the SI unit of force?
Newton
What is an unbalanced force?
Forces that causes a change in motion
Why do passengers move backward when a car accelerates?
Their bodies resist the change in motion
Does a heavier object have more inertia?
Yes
What happens to a moving object if no net force acts on it?
It keeps moving at constant speed and direction.
What two states of motion does newtons first law describe?
Rest and constant motion
What is the net force when two equal forces push in opposite directions?
Zero newtons
Why does a hockey puck slide across ice for a long time?
What happens to inertia when mass increases?
Inertia increases
What can change an objects motion?
An unbalanced net force