Unit 4 Work and Energy

Match the following vocab

• Make work easier by changing a force

• Power

• Using Force to move an object a distance

• Work

• Measure amount of work done over time

• Machines

Match the following

• Measure of the kinetic energy of atoms

• Energy

• The ability to do work

• Temperature

• Transfer of Thermal Energy

• Heat

Match the following energy types to their proper definition

• The energy of Movement

• Electromagnetic Energy

• Energy that travels as waves

• Mechanical Energy

• Energy of moving atoms in matter

• Thermal Energy

• Energy stored in the Nucleus of atoms

• Chemical Energy

• Energy stored between bonds of compounds

• Nuclear Energy

Which situation describes Work being done

• Sitting still in a chair

• Lifting Weights upwards

• Staring at the wall

• Pushing a heavy box, but it doesn't move

When we eat food, which type of energy are we getting from the food as we digest it?

• Chemical

• Kinetic

• Nuclear

• Elastic Potential

As a skater rides down a hill, what is true about their energy?

• No forces act on the skater

• The skater has kinetic energy while moving

• The skater never has potential energy

• Gravity is the only force that acts on the skater

A lever gives a mechanical advantage of 3. What does that mean?

• The work the lever does is 3 times less than you do to the lever

• The lever applies 3 times more force than you do to the lever

• You apply 3 Force to the lever

• There are 3 levers built into one

Gas powered cars convert chemical energy in gasoline into thermal energy in the engine.

Most of this thermal energy converts into mechanical energy to move the car, but its not 100% efficient.

What happens to the rest of the thermal energy?

• It is released as waste heat

• It turns back into gasoline

• It is destroyed in the energy transformation

True or False: Machines ONLY increase the amount of work that is done

• True

• False

Which temperature of water will its molecules be moving the quickest?

• Cold Water

• Room Temperature Water

• Boiling Water