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Astronomy/Quick help with question before test

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Expert: - 11/12/2010


Question

Physics
Hey,

I have a test early tomorrow morning and I'm doing review
questions but I just don't know how to do this one question.
If you are able to answer it I'd really appreciate a
solution as soon as you can.

A 6.0 kg toy car can move along an x axis; Figure gives Fx
of the force acting on the car, which begins at rest at time
t=0. The scale on the Fx axis is set by Fxs = 3.0 N. In
unit-vector notation, what is p at (a)t = 7.0 s and (b)t =
2.0 s,(c) what is v at t = 6.0 s?

I have to give the 3 answers in i j and k components.

I attached an image of the problem diagram to this question.

Thanks so much,
Mike

Answer
That's not an astronomy question, that's a physics question, I believe involving Newton's second law. Please consult the directory and ask a physicist.  Astronomy is part of the Earth Science Department, or at least it... should be, and not the physics department. (There is also chemistry, meteorology, math, biology, and even some theology... as part of astronomy too, but we don't place astronomy in those departments either, do we?)
Clear Skies,
Tom
PS:  Plus we're not supposed to do homework questions either.

Tom Whiting

Expertise

Astronomy has been my hobby/pasttime for over 50 years.  Currently own 3 telescopes, the largest of which is a 30 inch Newtonian truss Dob that is portable.I taught Astronomy/Meteorology at the University Level for 13 years before retiring in 1995. Being retired and home most of the time, I am able to answer all questions relatively quickly, unless it's a new moon weekend with good observing conditions.  No astrology questions please, or questions about alleged UFO picture identifications.

Experience

Experience: Astronomy has been my hobby and study for over 50 years. We currently now own a 30 inch portable telescope (Updated - Pennsylvania`s largest portable telescope). It can be seen on our website at:http://www.velocity.net/~bwhiting and also attend several regional starparties during the year, and have been on 5 total solar eclipse expeditions.

Organizations: President, Erie County Mobile Observers Group for over 15 years.

Publications: Wrote the "Over Erie Skies" newspaper article in our local newspaper for 11 years (1975-86).

Education: Masters Degree- Taught at the University level for 13 years. Retired 20 years -USAF Pilot - KC-135 with 180 combat missions;  Also Eagle Scout, Philmont staff 2 Yrs, Order of Arrow Lodge Chief, Ham Radio (inactive).

Awards: two discoveries: The mini-coathanger asterism in Ursa Minor (the little dipper) And the mini-ladle- another asterism in the bowl of Ursa Minor. Clients: Currently President of the ECMOG as mentioned above.

Education/Credentials
BS  Metallurgical Engineering Grove City College, PAMaster's Degree, Gannon University, Erie, PA Also retired USAF pilot, 20 years.

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