PE and KE and more Energy

What is Energy?

• The ability to do work or cause a change.

• The ability not to do work or cause no change.

•Whenever work is done energy is __________ that object.

• transferred to

• moving away from

• cicle

• flow

Power is the rate at which the energy is

• swing

• transferred

• blown

What do YOU think the unit for energy is?

• Watt

• Kg

• mass

• Joules

Two Types of Energy are ______________

• Kinetic Energy (KE)

   

•  

  Potential Energy (PE)

• Both

Definition of KE is ______________

• the energy of static

• the energy of motion.

KE depends on 2 things............

• Mass and Velocity

• Mass and kg

• Speed and Velocity

What will happen with Kinetic Energy when mass increases

and when velocity increases?

• KE will stay the same

• KE will drop

• KE will increase

The formula for KE is .............

• KE = ½ mv2

• KE = mv2

• KE = ½ mv

1.A car – 500 kg with a speed of 10 m/s.

●

2.A car – 500 kg with a speed of 20 m/s.

How much more will the speed be in the 2nd case from the 1st case?

• 2 x more work

• 4 x more work

• 4 x more wor6

• 8 x more work