Vocabulary
_______ machines help make work easier by changing the amount of force needed or the direction of the force.
Simple
A wheel and _____ helps you move or turn things with less force.
axle
Give an example of a lever
Seesaw, crowbar, scissors, etc
Give an example of a pulley
flagpoles, window blinds, cranes
A force that opposes motion and acts between two objects that are touching is _____.
friction
A lever is a stiff bar that moved around a fixed point called a ________.
fulcrum
A ______ uses a wheel and a rope to lift or lower objects
pulley
Give an example of an inclined plane
ramps, sloped roads
Forces that cause a change in motion are ____________ forces.
unbalanced
The use of force to move an object is _____.
An ________ ______ is a flat, slanted surface that helps you move objects from a lower place to a higher place.
Inclined Plane
A ______ scale is a tool used to measure force
Spring
Give an example of a wedge
axe, knife, doorstop
A force of attraction between two objects, even if they aren't touching, is ________.
gravity
A _______ ________ does work using one motion.
simple machine
A ______ is made of two inclined planes put together.
Wedge
What is force?
The pull of gravity on an object
Give an example of a screw
jar lids, bottle caps, actual screws
A push or pull, which causes movement or change in an object's movement or shape, is a _____.
force
Give an example of a simple machine found in a house.
A broom
A _____ is an inclined plane wrapped around a shaft.
screw
What units do we use to measure force?
Newtons
Give an example of a wheel and axle
door knobs, bicycles, cars
Forces on an object that are equal in size and opposite in direction are ______ forces.
balanced
Give an example of force being applied
pushing a swing, pulling a wagon, etc.