Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] The Impulse Momentum Theorem

-> -----Original Message-----
-> From: Phys-l [] On Behalf Of Paul
-> Nord
-> Sent: Thursday, November 06, 2014 8:11 AM
-> To:
-> Subject: [Phys-L] The Impulse Momentum Theorem
-> Question: Do you teach the Impulse Momentum Theorem?

At our university we do impulse-momentum in trig-based and calculus-based physics and connect it to conservation of momentum concepts, etc. We also look at area under the F vs t curve. We don't look at impulses in physical science (non-science majors with minimal math) --conservation of momentum takes enough mental effort for that audience.

If you handle Newton's 2nd Law as "the force is related to the rate of change of momentum", then F=ma is secondary. I think you need to cover both ideas. Define momentum first (p=mv) then introduce Delta p = F Delta t. Impulses help explain how air bags and Styrofoam peanuts do their jobs.

-> It seems that Impulse was dropped from the curriculum at some point in the
-> past. Was there a reason for this?
Are you talking about high school curricula?