Types of Energy
Kinetic & Potential Energy
Friction
Calculating Work and Power
Simple Machines
100
The ability to do work or cause change
What is energy?
100
Energy of motion
What is kinetic energy?
100
Force that opposes motion
What is friction?
100
force times distance gives you ______
What is work?
100
Make work easier
What do machines do?
200
Energy stored in a slingshot
What is potential energy?
200
Stored energy
What is potential energy?
200
The opposite direction from the direction of the motion
What is the direction of the force of friction?
200
work divided by distance
What is force?
200
A seesaw, a hammer, a crowbar, a light switch
What is a lever?
300
Energy can only be converted from one form to another; it cannot be destroyed or created.
What is The Law of Conservation of Energy?
300
Kind of energy that increases as an object moves faster and faster.
What is kinetic energy?
300
Can energy be created or destroyed?
No! It can only be transferred.
300
Amount of work done when 4 Newtons of force is applied to an object over a distance of 5 meters.
What is 20 Joules?
300
What is the ratio of work out to work in?
Efficiency
400
A battery is used to light a lightbulb. It's transferred from ______ energy to _______ energy.
What is chemical potential energy to electrical energy to radiant (light) energy?
400
For a ball tossed into the air between two people, part when potential energy is increasing and kinetic energy is decreasing.
What is the time when the ball is thrown up into the air?
400
Mechanical energy is due to the ______ or _______ of something.
position or movement
400
What is work done over a specific amount of time?
What is power?
400
Can machines decrease the total amount of work that gets done?
No!
500
A big rock that has 20,000 Joules of gravitational potential energy when it is 10 meters off the ground has this weight.
What is 2,000 Newtons?
500
Kinetic energy of a 10 kilogram rock falling at a rate of 3 meters/sec.
What is 45 Joules?
500
List the formulas for both potential AND kinetic energy.
PE = mgh KE = .5mv2
500
Amount of time it takes to do 500 Joules of work using 5 watts of power
What is 100 seconds?
500
List the six kinds of simple machines
What are lever, pulley, screw, wedge, inclined plane, wheel & axle?
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