• FORCE AND MOTION VOCABULARY

constant - not changing

direction - the path a moving object follows

distance - a measure of how far an object moves

force - a push or a pull

friction - a force that slows objects down

gravity - a force that pulls objects toward each other

inclined plane - a simple machine made of a slanted surface (a ramp)

lever - a simple machine made of a bar that moves around a fixed point

mass - the amount of matter in something

motion - a change in position

position - an object's location

pull - a force that moves an object closer to another object

pulley - a simple machine made of a rope that goes around a wheel

push - a force that moves an object away from another object

screw - a simple machine made of a rod with an inclined plane wrapped around it

simple machine - a tool that makes work easier

speed - a measure of how fast an object travels

time - a measure of how long it takes an object to go a distance

variable - something in an investigation that changes

wedge - a simple machine made of two inclined planes that are stuck together

wheel and axle - a simple machine made of a wheel that turns around a rod

work - using force to move an object