Measurements & Units
How close a measurement is to an accepted or true value
A) Precision
B) Velocity
C) Accuracy
D) Acceleration
Accuracy
The rate at which velocity changes
A) Speed
B) Velocity
C) Accuracy
D) Acceleration
Acceleration
Combined forces that result in a zero net force on an object
A) Static Friction
B) Balanced Forces
C) Sliding Friction
D) Unbalanced Forces
Balanced Forces
The energy of motion
Kinetic Energy
A device with moving parts that work together to accomplish a task
A) Fulcrum
B) Work output
C) Lever
D) Machine
Machine
How close together or reproducible repeated measurements are
A) Velocity
B) Precision
C) Inertia
D) Accuracy
Precision
A variable that gives you both speed and direction
Velocity
A push or pull, or any action that involved the interaction of objects and has the ability to change motion
A) Inertia
B) Force
C) Accuracy
D) Acceleration
Force
Stored Energy that comes from position
Potential Energy
Which of these is NOT a simple machine?
A) Screwdriver
B) Pliers
C) Fan
D) Scissors
Fan
What two parts does a measurement have?
Value and Unit
Describes how quickly an object moves, calculated by dividing the distances traveled by the time it takes
distance/time = ?
Speed
A law of motion that states that an object at rest will stay at rest and an object in motion will stay in motion with the same velocity unless acted on by an unbalanced force.
Newton's First Law
What is transferred when work is done?
A) Weight
B) Mass
C) Energy
D) Speed
Energy
A stiff structure that rotates around a point called a fulcrum
Lever
Put the following into the correct order from smallest to largest:
Centimeter, Kilometer Meter, Millimeter
Millimeter, Centimeter, Meter, Kilometer
What is the distance between speed and velocity?
Velocity has both a size and a direction
A law of motion that states acceleration is force divided by mass
Newton's Second Law
Kinetic energy increases with
A) Mass and Speed
B) Speed and Distance
C) Speed and Time
D) Mass and Distance
Mass and Speed
Which of the following temperature scales is used by most of the world's citizens?
Celsius
Why is it important to include units when making measurements?
Units provide information about the type of measurement.
Units help describe the size of the quantity being measured
Without units, it is impossible to tell the quantity being measured.
An object moving with constant speed has:
A) An unbalanced net force
B) A net force less than zero
C) A net force greater than zero
D) A net force equal to zero
D) A net force equal to zero
A law of motion that states for every action force, there is a reaction force equal in strength and opposite in direction
Newton's Third Law
What happens to the kinetic energy of a moving car if you double the mass of the car?
A) It decreases by 4 times
B) It increases by 4 times
C) It decreases by 2 times
D) It increases by 2 times
It increases by 4 times
A simple machine is an unpowered mechanical device that accomplishes a task in _________ movement(s).
One