Physics: Work, Energy, Power, Conservation Of Energy

Front 1

What is the equation used to calculate kinetic energy?

Back 1

Front 2

What is the equation used to calculate gravitational potential energy (for an object near the surface of the earth)?

Back 2

Front 3

What is the equation used to calculate elastic potential energy? (like in a spring.)

Back 3

Front 4

What is the equation used to calculate work?

Back 4

Work = Fdcos(x)

where:

F = applied force

d = distance over which the force is applied

x = the angle between the force and the direction of travel

Front 5

What does the Work-Kinetic Energy Theorem State?

Back 5

The Work-Kinetic Energy Theorem states that the total amount of work put into a system equals the change in kinetic energy of that system.

Front 6

What is "Conservation of Energy"

Back 6

"Conservation of Energy" is the idea that energy is never created not destroyed. It can only change from one form to another.

Front 7

What is the equation for calculating power?

Back 7

Front 8

Name 6 different types of energy.

Back 8

• Kinetic Energy
• Gravitational Potential Energy
• Elastic Potential Energy
• Chemical Energy
• Thermal Energy
• Light (Electromagnetic Energy)
• Sound Energy (really another type of kinetic)

Front 9

Define Energy.

Back 9

Energy is the ability to do work.

Front 10

Define Work.

Back 10

An amount of energy that has been added to a system.

Front 11

What are the units we use to measure energy?

Back 11

Joules

Front 12

What units do we use to measure power?

Back 12

Watts or Horsepower

(or foot-pounds per minute :)

Front 13

How do you convert from Watts to Horsepower?

Back 13

Divide the number of Watts by 746. (approximately, a more exact number is 745.699872)

Front 14

How do you convert from Horsepower to Watts?

Back 14

Multiply the number of horsepower by 746.

(approximately, a more exact number is 745.699872)

Front 15

What is a calorie?

Back 15

A calorie is a unit of energy. It is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius.

Front 16

What is the difference between a calorie and a Calorie?

Back 16

Calorie with a capital 'C' is actually a kilocalorie, meaning it is equal to 1,000 regular calories. kilocalories are also often called 'Food Calories' because they are the calories listed on food labels.

Front 17

How do you convert from calories to Joules?

Back 17

Multiply the number of calories by 4.186.

Front 18

How do you convert from Joules to calories?

Back 18

Divide the number of calories by 4.186.

Front 19

How do you convert from Calories to Joules?

Back 19

Multiply the number of Calories by 4,186.