Equilibrium
What is the net force of equilibrium?
Net force is zero.
What is the definition of force?
A push or a pull on an object.
What causes motion?
A force
What is the definition of inertia?
An objects resistance to change in motion.
Who is stronger, the average chimpanzee or a full-grown man? (Big Bill)
While chimpanzees are normally half the height of a human, they are on average 1.5 - 3 times stronger than humans.
What is the term for when an object has no motion, and all forces are equal?
static equilibrium
What is the difference between force and net force on an object?
Force is any push or pull; net force is the combination of all acting forces.
How does inertia relate to the motion of an object?
Inertia keeps an object at rest or in motion.
How are mass and inertia related?
Directly related, as you increase mass you also increase inertia.
What was the release date of Fortnite? (the year)
2017
An object moving at constant speed in a curved-line path is...
Define a vector quantity and give 3 different examples.
A vector has both magnitude and direction.
Examples can vary.
What are two things that Galileo discovered about motion?
Frictional force is needed to stop the motion of an object.
Using ramps Galileo demonstrated that force is needed to get an object moving and to get an object to stop moving.
What is the difference between mass and inertia?
Mass is a measurement
Inertia is a concept
The Sun makes up ____ mass in our solar system.
a. 40%
b. 62%
c. 81%
d. 99%
99%
A book is being pushed across the surface of a table. Name 4 forces acting upon it.
Frictional Force
Gravitational Force
Applied Force
Normal Force
What is the formula for force? Define each variable and include the units.
F = ma
F = force (Newtons)
m = mass (kilograms)
a = acceleration (m/s^2)
Aristotle came up with two forms of motion. List and define them and give 2 examples of each.
Violent motion = imposed motion
Natural motion = vertical motion up and down
Examples vary
What was the argument for an earth that is motionless and how does inertia refute this argument.
Bird can drop vertically down from a tree to catch a worm. This can occur because everything on the planet has inertia and is moving in synch with the rotation of the earth.
What is the ultimate goal for our return to the moon in 2024?
To create a space station for permanent human residence.
The sum of forces is denoted by "Σ". What Greek letter is this?
Uppercase sigma
A meteor that weighs 20lbs is falling to the earth. What force does the meteor have? Maks sure to convert lbs to kilograms.
89.1N
List and define the first two laws of motion. If you can only list one you will get 100 points. If you list both you will get 500 points.
1st law = An object in motion or at rest while remain in motion or at rest unless an outside force acts upon it.
2nd law = Force acting on an object is directly proportional to its mass and acceleration.
We watched the video on what would occur of the earth stopped spinning. List 5 different things that would occur and explain who would be most likely to survive in the scenario.
Astronauts on the space station are most likely to survive.
Elon Musk finally bought Twitter at the beginning of this week. What did he bring into the Twitter headquarters and say?
He brought in a sink, placed it on the ground and said, "let that sink in."