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Force and Motion
Simple Machines
Laws of Motion
Vocabulary
Levers
100
A force caused by two objects rubbing together.
FRICTION
100
A saw used to cut wood is an example of this simple machine.
A WEDGE
100
This scientist discovered the Laws of Motion.
ISAAC NEWTON
100
A measure of the amount of matter in an object.
MASS
100
The object lifted with a lever.
A LOAD
200
A force that pulls objects to the Earth.
GRAVITY
200
A wheel with a rope in the grooved rim. It is used to lift heavy things.
A PULLEY
200
The tendency of a moving object to keep moving in a straight line or of an object at rest to stay at rest.
INERTIA (LAW 1)
200
Something used to make work easier.
A MACHINE
200
A lever used to pound a nail.
A HAMMER
300
A push or a pull that acts on an object.
FORCE
300
An inclined plane twisted around a rod.
A SCREW
300
The reason you need to wear a seatbelt in a moving vehicle.
INERTIA
300
When you use force to move an object a distance.
WORK
300
The class of lever that includes the bat.
THIRD CLASS LEVERS
400
A tool used to measure force.
A SPRING SCALE
400
The machine that raises the flag to the top of the flagpole.
A PULLEY
400
What law of motion applies to this situation? A rocket's downward thrust moves it upward.
LAW 3 - For every action there is an equal and opposite reaction.
400
How fast an object's position is changing over time.
SPEED
400
The class of levers that include the wheel barrow.
SECOND CLASS LEVERS
500
Explain the event that led Isaac Newton to the discovery of gravity.
He was sitting in a garden and saw an apple fall from a tree. He wondered why the apple fell down and not some other direction.
500
Rolling an object on wheels requires less force than dragging the object. What do the wheels do?
REDUCE FRICTION
500
Which law of motion applies to this situation? A spaceship floats forever through space.
LAW 1 - An object in motion tends to stay in motion, and an object at rest stays at rest, unless acted upon by an outside force.
500
The speed and direction of a moving object.
VELOCITY
500
Name the three parts that all levers have.
EFFORT, FULCRUM, LOAD