What is the name of a complicated type of machine that is made to do something simple?
Rube Goldberg machine
What is energy?
The ability to do work or cause change
What is motion?
When an object's position changes relative to another object.
What is Force?
A push or a pull.
What is work?
Any time you exert a force on an object that causes the object to change its motion in the same direction in which you exert the force.
Imagine that you are trying to open a jar, and the lid is stuck. You exert a lot of force on the lid, but it doesn’t move. Are you doing work?
No. No matter how much force you exert, you don’t do any work if the lid does not move.
The amount of ____ done on an object is calculated by multiplying force times distance.
Work
What is power?
The rate at which work is done
What happens when an object has more power than another object?
An object that has more power than another object does more work in the same amount of time. It can also mean doing the same amount of work in less time.
2 People load 10 items on the truck in 10 minutes: How can power be increased?
By loading more items in 10 minutes, or loading 10 items in less than 10 minutes.
What is the mathematical formula for power?
Power = Work/Time
What unit is power measured in?
Watts
What unit is work measured in?
Joules
What unit is force measured in?
Newtons
Is work done when you hold a heavy object for a long time? Why or why not?
No. Because there is no motion
What is kinetic energy?
Energy an object possesses by virtue of being in motion.
