Second Law of Motion: Momentum is conserved. Momentum can be defined as mass in motion. Something must be moving to have momentum. Momentum is how hard it is to get something to stop or to change directions. A moving train has a whole lot of momentum. A moving ping pong ball does not. You can easily stop a ping pong ball, even at high speeds. It is difficult, however, to stop a train even at low speeds.


Materials: garden hose connected to a water faucet


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4 Responses to “Newton’s Second Law of Motion”

  1. Conservation means “to save”. In this context, conservation of momentum means that, when objects in motion interact, all the momentum involved in the system (group of objects) is saved. But that momentum may be transferred from one object to another, depending on each objects mass and velocity.

  2. elisabeth_hill says:

    How do you describe the term ‘conservation’?

  3. I’ll have Tonya connect with you.

  4. a_clapper says:

    I can’t watch any videos because it says that it is advanced content