Kinetic and Potenital

Kinetic and Potenital

Kinetic Energy

• energy in motion

• energy is being transferred

• dependent on mass and velocity of an object ( velocity is speed in a given direction)

• the more work that is done, the more energy it has.

• EX. it taks more energy to roll a bowling ball at the same velocity(speed) than a golf ball because the bowling ball has more mass, therefore more energy

• Kinetic energy increases as mass increases

• Kinetic energy increases as velocity increases

Formula

• Formula to calculate Kinetic Enery

Potential Energy

• Energy that is stored and held in readiness

• ex lifting a book, pull a bow back

Two types of Potential Energy

• Elastic potential Energy- associated with objects that can be stretched or compressed

• Gravitational Potential Energy (GPE) associated with height of an object

• https://youtu.be/kAD0KVvqWpA

Two Formulas

• If you know the weight of an object : GPE= Weight X height

• If you know the mass of an object: GPE= Mass X Gravitational acceleration (9.8 m/s² ) x Height

• The unit is in Joules (J)

Multiple Choice

What kind of energy is in a person running?

• Potential
• Kinetic

Multiple Choice

Which 2 letters have the most kinetic energy

• W & Y

• X & Z

Multiple Choice

2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?

• 1
• 2
• 3
• 4

Multiple Choice

When a pendulum swings, at which point is potential energy at its greatest?

• 1
• 2
• 3
• 4

Multiple Choice

Which point has the most potential energy?

• G
• f
• b
• a

Multiple Choice

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

Multiple Choice

What kind of energy is in a moving skateboard?

• Potential
• Kinetic

Multiple Choice

What kind of energy is in a rock at the edge of a cliff?

• Potential
• Kinetic

Multiple Choice

When a pendulum swings, at which point is potential energy at its greatest?

• 1
• 2
• 3
• 4

Multiple Choice

At which point is potential energy greatest?

• W
• X
• Y
• Z

Multiple Choice

When you stretch a rubber band, you are storing __________ energy. 

• kinetic 
• potential
• none of the above
• all of the above 

Multiple Choice

Energy that is stored is called:

• Kinetic Energy
• Potential Energy

Multiple Choice

Energy in motion is called:

• Potential Energy
• Kinetic Energy