Types of Energy
What type of energy is stored in food and fuel?
Chemical
What is the purpose of a simple machine?
To make work easier
What is the formula for work?
Work = Force × Distance
What is potential energy?
Stored energy due to position or shape
What type of energy powers your phone?
Electrical
What is energy?
The ability to do work or cause change
What type of simple machine is a seesaw?
Lever
What is the formula for power?
Power = Work ÷ Time
What is kinetic energy?
Energy of motion
Where did Mr.Michura play college hockey
Potsdam
What type of energy comes from moving electrons?
Electrical
How does a pulley make lifting objects easier?
Changes the direction of the force applied
What unit is work measured in?
Joules
What happens to PE and KE as an object falls?
PE decreases, KE increases
How many dogs does Mr. Michura have?
3
What type of energy is carried by light waves?
Electromagnetic
What type of simple machine is a wheel barrow
second-class lever that also includes a wheel and axle.
A person lifts a 50 N box 2 meters in 5 seconds. How much power is used?
(50×2)/5 = 20 watts
alculate the potential energy of a 2 kg object lifted 5 meters high (g = 9.8 m/s²).
PE = 2×9.8×5 = 98 J
What energy transformation happens in your body when you run?
(Chemical → Mechanical + Thermal)
Fire is an example of what two types of energy being released?
Thermal and Light
What are the six simple machines?
Lever, wheel and axle, pulley, inclined plane, wedge, screw
Why is no work done when holding a heavy object still?
Because there is no movement (distance = 0)
A 3 kg ball is moving at 4 m/s. Find its kinetic energy.
KE = ½mv² = ½×3×16 = 24
Why do roller coasters slow down at the end of a ride?
Friction