Definitions
This is a push or a pull, and can cause something to move.
What is force.
This scientist lived in the 17th century and came up with the laws of motion.
Who was Isaac Newton
Force includes both magnitude (size) and this.
What is direction
A ramp is an example of this simple machine.
What is an inclined plane
This is the force that causes things to fall to the ground.
What is gravity
This is an object's tendency to keep doing what it is already doing - moving or staying still.
This law states: An object in motion will stay in motion and an object at rest will stay at rest unless a force acts on it.
What is the First Law of Motion.
This is the change in distance divided by the change in time. It is usually measured in meters/second.
What is speed
A doorstop is an example of this simple machine.
What is a wedge
This is how gravity is measured.
What is weight
This is what is done when a force causes an object to move.
What is work
This law states that there is always an equal and opposite reaction to a force.
What is the Third Law of Motion
This is the total of all forces acting on an object.
What is Net Force
A see-saw is an example of this type of simple machine.
What is a lever
This is what causes sandpaper to heat up when rubbed back and forth.
What is friction
This is how fast or slow work is done.
What is Power
This law explains why a bowling ball would move slower than a baseball thrown at the same speed.
What is the Second Law of Motion. (Or, what is acceleration = force/mass)
Acceleration includes speeding up, slowing down, and this.
What is change in direction
This type of simple machine often makes the job of a hammer and nail easier.
What is a screw
This is the force that causes a compass to point to the North Pole.
What is magnetism
These are made up of two or more simple machines, to make work easier.
What are complex or compound machines.
A bicycle can slow down faster than a car because of this law of motion.
What is the Second Law of Motion
Ancient humans created these to make work easier.
What are simple machines
An elevator often uses this type of simple machines to lift heavy weights.
What is a pulley
This is the force that keeps Pluto orbiting around the Sun.