Forces and Motion
What is a force?
A push or a pull
What is another name for Newton's First Law?
The Law of Inertia
What is another name for Newton's Second Law?
The Law of Force and Acceleration
What is another name for Newton's Third Law?
The Law of Action and Reaction
A water bottle sitting on a table continues to remain at rest, because no unbalanced force is acting upon it.
Newton's First Law
An object that has a net force of 0 N is a(n) _________ force.
Balanced
The greater the mass of an object, the ___________ it's inertia.
Force is equal to...
mass times acceleration
For every action, there is a _________ and ________ reaction.
Equal and opposite
You kick a soccer ball with a large force, causing it to accelerate rapidly.
Newton's Second Law
What is the net force of the object?
The total of all forces acting on an object.
In the penny experiment, why did the penny drop down into the beaker?
Due to inertia
An object with a large mass will accelerate ________ (faster or slower?) than an object with a smaller mass when pushed by the same force.
In the balloon lab, what was the action and what was the reaction?
Action: Balloon releasing air
Reaction: Balloon traveling down the string
If pulled quickly, a tablecloth can be removed from underneath dishes without moving the dishes.
Newton's First Law
What is the formula for acceleration?
s2-s1 / t
Which item has more inertia? One of our classroom's frogs or a bowling ball?
A bowling ball.
If an object with a mass of 4.0 kg is pushed with a force of 2.0 N, what will the acceleration of the object be?
0.50 m/s2
What are two equal and opposite forces that occur when a person walks on the sidewalk?
Person pushing against the sidewalk
Sidewalk pushing against the person
The air let out of a balloon causes it to fly across the room
Newton's Third Law
A runner accelerates from a speed of 10 m/s to a speed of 5 m/s in 10 s. What is the runner's acceleration?
What is gravity?
The force of gravity exists between any two objects that have mass. The force is attractive and pulls objects towards each other.
What is the difference between weight and mass?
Weight is a force, just like the push of your hand is a force, and is measured in Newtons. Mass is the amount of matter in an object and does not depend on location.
Which of the following is an example of Newton's Third Law?
a. A full grocery cart requires more force to push than an empty cart
b. pushing backward in order to move forward while ice skating
c. a cookie sitting on a plate
b. pushing backward in order to move forward while ice skating
A fireman turns on a hose and is knocked backwards
Newton's Third Law