Energy, work, & Power

The unit of work is

• watt

• hertz

• joule

• pascal

Which requires more WORK – a person WALKING up stairs OR a person RUNNING up stairs?

• walking

• running

• they require equal work

• no work is required for either because the movement is vertical

As speed increases, kinetic energy

• Increases

• Decreases

• Stays the same

• Increase then decrease

The kid at the top of the roller coaster car pictured here has

• 100% Potential Energy

  0% Kinetic Energy

• 75% Potential Energy

  25% Kinetic Energy

• 50% Potential Energy

  50% Kinetic Energy

• 0% Potential Energy

  100% Kinetic Energy

What type of energy is in this picture?

• Kinetic
• Elastic Potential

• Gravitational Potential

• Sound

What is energy?

• Force

• The ability to do work

• Electricity

• The ability to transform work

Which of the following energy types are Potential energy?

• Chemical Energy

• Radiant Energy

• Thermal Energy

• Nuclear Energy

• Elastic Energy

What is thermal energy?

• Electromagnetic energy that travels in waves and comes from the sun

• Heat that is in substances - the motion of atoms and molecules

• Energy stored between the bonds of atoms in molecules

• Energy stored in the nucleus of an atom.

What kind of energy

resources ?

• Geothermal

• Tidal

• wind

• Biofuels

What characteristic do all renewable resources share?

• Produced by waste products
• Form underground from dead organisms.
  
• Replaced in a short period of time
• Allow energy to pass through them easily