a push or pull that moves an object
force
a machine made of 2 or more simple machines working together to make a job easier
compound machine
a straight, stiff object that helps you lift things more easily:
lever
a tool that helps us do work or make a job easier:
machine
A tool with a sharp blade and a long handle:
ax
a round object that turns or rolls to help things move:
wheel
a flat surface that is higher on one end and lower on the other:
ramp & inclined plane
a flat, sharp part of a tool that is used for cutting:
blade
what happens when you rub 2 things together
friction
a tool that makes work easier by helping us push, pull, or lift things:
simple machine
a tool that is thick on one end and pointy or thin on the other end:
wedge
a simple machine that looks like a nail with ridges that twist around & around like a spiral
screw
a bar that goes through the middle of a wheel to help it spin:
axle
the point where something rests and turns, like the middle of a seesaw:
fulcrum
a simple machine that has a wheel with a rope or chain that goes around it:
pulley