Physics (Work & Energy & C.O.E.)

Equations/Formulas

100

U_g = 𝑚𝑔ℎ

What is the formula for gravitational potential energy?

200

g = 9.8^m/_s²

What is the value for accelertation due to gravity?

300

K = 1/2mv²

What is the formula for kinetic energy?

400

E_total = U_g+K

What is the formula for total energy?

500

△U_g = Final potential -Initial potential

What is the formula for change in gravitational potential energy?

Definitions

100

The ability to do work 

What is Energy?

200

The energy of an object due to its motion

What is Kinetic Energy?

300

Kinetic and potential energy are types of this energy 

What is Mechanical Energy?

400

The energy of an object based on its position within a gravitational field

What is Gravitational Potential Energy?

500

1.) Energy can neither be created nor destroyed

2.) Energy remains constant in the isolated system

3.) Energy can be transformed from one form to another

What does The Laws of Conservation state?

Examples

100

If a cart weighs .253kg and travels 1m in 2.15s with a velocity of 0.456m/s how much kinetic energy will it have? K = 1/2mv²

.026J

200

Bob is holding a bowling ball that weighs 3.7kg 2 meters above ground. How much gravitational potential energy does it have? U_g = 𝑚𝑔ℎ

72.52J

300

In 40 seconds Jake drives 10 miles with a velocity of 2.5 m/s and then stops on a flat road. How much gravitational potential energy does the car have? U_g = 𝑚𝑔ℎ

OJ

400

A basketball has 15J of potential energy when being dropped. How much potential energy does the basketball have halfway?

7.5J 

500

A .5kg bullet is traveling with a velocity of 90m/s. How much kinetic energy does the bullet have? K = 1/2mv²

2025 J

Miscellaneous

100

This type of system is where nothing (including energy) cannot enter or leave

What is an isolated system?

200

Bob drops a tennis ball off the top of a building and it falls to the ground. Where will kinetic energy be the highest when its dropped?

Right before it hits the ground

300

When an object travels from the ground to a higher height, what is true about its change in gravitational potential energy?

It will be a positive change

400

The type of energy a kid has at the top of a slide

What is potential energy?

500

The potential energy of an object/system can be driven to zero

What happens when an object approaches the ground? 

Units

100

m/s²

What is the unit for acceleration?

200

J (Joules)

What is the unit of energy or work?

300

kg

What is the unit for mass

400

m

What is the unit for distance?

500

N

What is the unit for Newton (Force)