Force and Motion
A change in position
What is motion?
The person who discovered the laws of motion
Who was Isaac Newton?
A device that makes work easier
What is a machine?
A dark area or shape cast by an opaque object
What is a shadow?
Tiny particles that make up matter
What are molecules?
The push or pull on an object
What is force?
The designer of the laws of motion
Who is God?
Can help to overcome friction because of its rolling action
What is the wheel and axle?
To throw back light, changing its direction
What is to reflect?
The substance of the physical world. It is real, has weight, and takes up space
Movement resulting from force
What is work?
An object at rest will stay at rest unless acted upon by an unbalanced force
A simple machine that uses a wheel and axle, as well as a cord to lift an object
What is a pulley?
Material that allows no light to pass through
What is opaque?
The world we live in and interact with
What is the physical world?
A force that works against motion along a surface
What is friction
An event in which two or more objects exert force on each other in a relatively short time. Energy that is transferred from one object to the other
What is a collision?
Can overcome some gravity and friction with a slope, making it easier to move large objects with less effort
What is an inclined plane?
Material that allows light to pass straight through it
What is transparent?
The ability to do work
What is energy?
A greater force that overcomes opposing forces, resulting in work
What is unbalanced forces?
The property of matter that makes it resist a change in motion
What is inertia?
The part of a simple machine that holds and balances weight
What is a fulcrum?
Material that allows light through but scatters it so objects cannot be seen clearly
What is translucent?
Another name for heat energy
What is thermal energy?