Newtons Laws
This term describes an object’s resistance to a change in motion.
What is inertia
The mathematical formula representing Newton’s Second Law.
What is F = ma
Newton’s Third Law states that for every action, there is one of these.
What is an equal and opposite reaction
This quantity is the rate at which velocity changes
What is acceleration
You push a shopping cart and it speeds up. Name the two variables that determine its acceleration.
What are force and mass
According to Newton’s First Law, an object in motion will stay in motion unless acted upon by this.
What is an unbalanced force
According to the Second Law, if mass increases and force stays the same, this happens to acceleration.
What is it decreases
As a rocket pushes gases downward, the gases push the rocket this way.
What is upward
This force pulls all objects toward Earth.
What is gravity
A heavy box is harder to start moving than a light box on the same floor. Which property of matter causes this difference?
What is inertia (or mass)?
When a car stops suddenly, passengers lurch forward due to this principle.
What is inertia/First Law
A 2 kg object accelerates at 3 m/s². This is the net force acting on it.
What is 6 N
When you push against a wall and feel the wall push back, you are experiencing this law.
What is Newton’s Third Law
The total of all forces acting on an object.
What is net force
When a balloon releases air, the balloon flies in the opposite direction. Which action–reaction pair is involved?
What is the air pushing out of the balloon and the balloon pushing forward
A book rests on a table without moving. The force of gravity pulls it downward, yet it stays still. What balanced force acts on the book to keep it at rest
What is the normal force from the table
This is the unit for force.
What is the Newton
These two forces always act on two different objects according to the Third Law.
What are action and reaction forces
These forces are equal in size but opposite in direction, causing NO change in motion.
What are balanced forces
A box is being pulled to the right with 15 N and pushed to the left with 15 N at the same time. Describe the motion of the box.
What is it will not accelerate because the forces are balanced
A hockey puck sliding on ice slows down because of this external force acting opposite its motion.
What is friction
A force of 50 N causes an object to accelerate at 10 m/s². The object’s mass is this.
What is 5 kg
A swimmer moves forward in water because they push water backward. Identify the reaction force.
What is the water pushing the swimmer forward?
A 10 N force to the right and a 6 N force to the left act on an object. Its net force and direction are these.
What are 4 N to the right
A runner changes direction around a curve while keeping a constant speed. What is happening to the runner’s velocity?
What is it is changing because direction is changing (so the runner is accelerating