Energy and Thermal Physics

Big ideas: More info...

  • The energy of a system can be changed by doing work or heating it.
  • In any event, energy is conserved, but is also dissipated - becoming less easy to put to use.
  • Equilibrium occurs when two or more external influences are in balance (statically or dynamically).

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We have 32 misconceptions on this result

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Momentum
Forces and Motion Supporting Physics Teaching

Predicting momentum

This is a quick puzzle, best done as a physical presentation, to compare the momentum of two very dissimilar balls after they...

Classroom Activity 14-16

Momentum
Forces and Motion Supporting Physics Teaching

Changing momentum

Things that are already moving require a force acting on them for a certain duration. You can't change the momentum without...

Classroom Activity 14-16

Impulse
Forces and Motion Supporting Physics Teaching

Impulse changes momentum

The model used to add or take away momentum explicitly accumulates the force over time and so allows you to see that it is...

Classroom Activity 14-16

Newton's Second Law
Forces and Motion Supporting Physics Teaching

Newton's second law and momentum

Throw a tennis ball harder and it leaves your hand faster. No surprise there–we're just describing an everyday occurrence in...

Physics Narrative 14-16

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