Newton's 1st
Newton's 2nd
Newton's 3rd
Feel the Force
Get the Action
100
What is Newton’s 1st Law commonly called?
The Law of Inertia.
100
What equation represents Newton’s 2nd Law?
F = ma
100
What does Newton’s 3rd Law state?
For every action force, there is an equal and opposite reaction force.
100
If the net force on an object is 0 N, are the forces balanced or unbalanced? What happens to the object’s motion?
Balanced forces; motion does not change.
100
A student jumps by pushing down on the ground. What force pushes the student upward?
The ground pushes upward on the student.
200
According to Newton’s 1st Law, what happens to an object that is at rest if no unbalanced force acts on it?
It remains at rest.
200
If acceleration stays constant but mass increases, what happens to the force needed?
The required force increases.
200
A person pushes on a wall with 20 N of force. How much force does the wall exert on the person, and in what direction?
20 N in the opposite direction.
200
Which team wins, and what does that tell you about the net force?
Team A exerting the greater force wins; the net force is 350N toward that team.
200
Air rushes backward out of a released balloon. What happens to the balloon, and why?
The balloon moves in the opposite direction of the escaping air.
300
According to Newton’s 1st Law, what happens to an object already moving if no unbalanced force acts on it?
It continues moving at constant velocity (same speed and direction).
300
A 10 kg cart accelerates at 10 m/s². What is the net force on the cart?
100 N
300
A swimmer pushes water backward. What is the reaction force?
The water pushes the swimmer forward.
300
What is the net force on the object? Include direction.
1N to right.
300
A baseball hits a fence with a force of 20 N. What force does the fence exert on the baseball?
20 N in the opposite direction.
400
What must happen for an object to change its state of motion?
An unbalanced/net force must act on it.
400
If mass stays constant and acceleration increases, what happens to the net force?
Net force increases.
400
In a head-on collision, Car A pushes Car B with 500 N of force. What force does Car B exert on Car A?
500 N in the opposite direction.
400
A moving car suddenly stops. What happens to the passengers, and which Newton’s law explains it?
The passengers continue moving forward due to inertia; Newton’s 1st Law.
400
A truck and a Prius collide. The truck exerts 2,000 N on the Prius. How much force does the Prius exert on the truck?
2,000 N in the opposite direction.
500
How does increasing an object’s mass affect its inertia? The effect mass has on inertia.
Increasing mass increases inertia.
500
Objects A and B experience the same net force. Object A has twice the mass of Object B. Which object has the greater acceleration? Explain using Newton’s 2nd Law.
Object B. It has half the mass, so with the same force it has twice the acceleration.
500
A bug hits a windshield, and the windshield exerts 10 N on the bug. How much force does the bug exert on the windshield?
10 N in the opposite direction.
500
An object has forces of 40 N right, 25 N right, and 80 N left. What is the net force and direction?
15 N left.
500
Identify the action-reaction force pair that causes the skateboarder to move.
The skateboarder pushes backward on the ground; the ground pushes forward on the skateboarder.