Vocabulary
Speed & Velocity/
Projectile Motion
Accelaration
Friction+Free Body Diagram
Newtons Law
100
What is force?
A push or a pull upon an object resulting from the object's interaction with another object.
100
What is the difference between speed and velocity?
The difference is that velocity has direction.
100
Acceleration is the rate at which these two things change
Speed or direction
100
What force opposes motion?
Friction
100
Which equation represents newton’s second law?
F=ma
200
True or False? Gravity is the force that exists between earth and objects near it.
True
200
A variable measured in (distance/ time)^2.
Acceleration
200
Acceleration and speed are indirectly proportionate. True or false, if false correct it.
False; directly proportionate
200
True or False: The size of the arrow in a free-body diagram reflects the magnitude of the force.
True
200
What is the constant (number AND UNIT) we always use for acceleration when we are calculating our scientific weight on planet Earth.
9.8 (m/s^2)
300
The change in the position of an object is called?
Displacement
300
The total distance and total time of a trip is known, what can you calculate?
Average Speed
300
A term designed to describe negative acceleration
Deceleration
300
What are the four fundamental force of nature? Explain each of them.
Gravitational: weakest and longest range Weak Nuclear: short range and responsible for Beta Decay Electromagnetic: long range Strong Nuclear: a short range, holds the nucleus together,
300
Newton's first law of motion is sometimes called the "law of inertia". Why?
It's called law of Inertia because the more force an object has, the more it will stay in motion, unless a object with a bigger mass acts on it
400
Fill in the blank The free fall acceleration of an object under Earth's gravity is directed toward the _______.
Center of Earth
400
A force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn. Which one is the correct answer. a) The object is experiencing some kind of friction b) The gravity on the object has increased
a) The object is experiencing some kind of friction
400
On a graph of velocity, the x-axis typically refers to this.
Time
400
Which occurs between two surfaces that touch but do not move in relation to each other?
Static friction
400
What is the mass of a person who has a force of 500 N pulling on them on a planet whose gravity is 11.5 m/s^2?
43kg
500
Fill in the blank A bullet, although small in mass, has a large _______ because of an extremely large velocity.
Momentum
500
Car A is traveling 15m/hr west while Car B travels .07m/s east. Which of the following changes in both situations: speed, mass, or velocity?
Velocity
500
Why is a fan blade spinning at a constant speed constantly accelerating?
A blade spinning at a constant speed is constantly accelerating because of Centripetal Accelerating.
500
What forces would be acting on you if you're running 50 meters?
F-normal, F-ground,F-friction, F-gravity, F-air
500
What has more inertia, a car with a mass of 900kg or a car with a mass of 1500kg? Explain your answer
The car with the mass of 1500 has a greater inertia because it has a larger mass.
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