The ability to do work is called __________
Energy
A push or pull is called a _____________
force
How quickly an object moves is described by its __________
speed
You squeeze the hand brakes on a bike. The force that slows down the bike is _________
friction
A machine made up of two or more simple machines is a _____________________
compound machine
A knife acts as a ___________ when cutting food.
wedge
A straight bar that moves on a fixed point is a ___________
lever
An object in _________ is changing its position.
motion
a ramp is an example of an _____________
inclined plane