Vocabulary
A push or a pull that acts on an object
What does the law of inertia say?
An object in motion tends to stay in motion and an object at rest tends to stay at rest, unless acted on by an outside force
When two objects are apply EQUAL forces against each other they are considered ______.
Balanced
What does m stand for in FMA?
Mass
The total amount of force acting on an object
Net Force
Friction
Type of force needed to slow down a moving object or accelerate an object at rest
Unbalanced
A 200kg car backing out of its driveway, backed into a tree while traveling at 2 m/s/s. What force did the car hit the tree with?
400 N
What is the gravitational force of the Earth?
9.8 m/s/s
When forces cancel each other out they are known as
balanced forces
Tendency for an object to resist a change in motion
Inertia
What determines the inertia of an object
Mass
A state trooper passes a semi truck on a highway in pursuit of a speeder. The cop and the semi are both traveling west. Do they both have the same velocity?
No, because the trooper was traveling at a faster speed.
What is the relationship between the mass of an object and its inertia?
More mass = more inertia
This occurs whenever an object speeds up, slows down, or changes direction?
acceleration
Speed with a given direction
Velocity
What is acceleration measured in?
m/s/s
Is a Newton a force that acts on an object?
No, its a unit of measurement
How much force is needed for Mr. Cleveland to get rid of his arch rival the Bigfoot if all Mr. Cleveland has to accomplish this task is a 200Kg boulder and the ability to throw the boulder with 4m/s/s acceleration?
800N
action/reaction forces are always equal and in the opposite ______
direction
Any Change in speed or direction
Acceleration
What is the rate at which gravity accelerates objects towards the Earth?
9.8 m/s/s
Who is easier to push on a swing, a werewolf or a vampire bat? And which law tells us this?
Law of inertia. The bat has less mass = less inertia
What is the formula for finding the mass of an object?
Force divided by acceleration
Which law allows you to calculate the force of an object?
Newton's Second Law