Energy Study guide

Why does a semi truck have more Kinetic energy than a small car traveling at the same speed.

A semi has more mass than a small car, causing the semi to go faster because mass is in the kinetic equasion.

Nuclear energy examples

Bomb, sun, power plant

Chemical energy examples

Camp fire, gas, food

All the types of energy

Chemical, Electromagnetic, Mechanical, Electrical, Nuclear, Thermal, Sound

What is energy (definition)

Energy is the ability to do work(movement)

PE or KE? A thrown Baseball

KE

PE or KE? Climbing to the top of a playground slide

KE

PE or KE? Moving bicycle

KE

Kinetic energy formula

KE=1/2mv^2

Electrical energy examples

Lightbulb, electricity, a phone

Electromagnetic energy examples

Magnets, sun, lightbulb

PE or KE? A book that has been raised above your head

PE

PE or KE? A wound up clock

PE

PE or KE? Sitting at the top of a playground slide

PE

PE or KE? Stretched rubber band

PE

Pontental energy formula

PE=mgh

Some but not all of the gasoline used by a cars engine is transformed into kinetic energy. Where might some of the rest of the energy go?

Thermal, mechanical, sound

Using energy transfers explain the following: The largest hill on a roller coaster is the first hill. All hills after this are smaller.

You wouldn't have enough energy to go up the smaller hills if they were bigger.

Using energy transfers explain the following: To get to the top of the highest hill a motor pulls the cars to the top. After the top of the first hill a motor is not needed to keep the cars going.

The potential energy transfers into kinetic energy going down the hill.

If an apple has 200j of chemical potential energy, how much kinetic energy will I get from it when I eat the apple?

200j

Mechanical energy examples

Robot, car, plane

Sound energy examples

Speaker, voice, microphone

Thermal energy examples

Steam, fire, oven

Using energy transfers explain the following: The roller coaster car moves really fast at the bottom of the hill but slows as it moves up to the top of the hill.

The kinetic energy is transferring into potential energy as it goes up the hill.

Where do you find the most and least potential energy.

The most is at the highest point and the least is at the lowest point.

Where do you find the most and least kinetic energy

The most is at the lowest pont and the least is at the highest point.