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Accelerated Motion Problem-easy but I NEED HELP on it

  1. Dec 8, 2007 #1
    [SOLVED] Accelerated Motion Problem--easy but I NEED HELP on it!!!

    Is NOT an example of accelerated motion?

    e. Horizontal component of projectile motion
     
    Last edited: Dec 8, 2007
  2. jcsd
  3. Dec 8, 2007 #2

    Shooting Star

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    What happens to the horz component of the velocity in projectile motion?
     
  4. Dec 8, 2007 #3

    Shooting Star

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    Yes, since it stays constant.
     
  5. Dec 8, 2007 #4

    Astronuc

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    Well - one could look at each answer and think about the acceleration involved.

    Going vertical near a massive body, e.g. earth or moon, a mass will experience the force (acceleration) due to gravity.

    Something that involves a change of direction (something rotating, swinging, oscillating) is accelerating, even if it maintains constant speed.

    The last answer would seem to infer constant speed (and velocity) provided a retarding or dissipating force (e.g. air resistance or friction) is not involved. Such would be the case in a vacuum or on a frictionless surface.
     
  6. Dec 8, 2007 #5

    Shooting Star

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    Also, we have to assume uniform gravitational field.
     
  7. Dec 8, 2007 #6

    Astronuc

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    i.e. that it doesn't change direction/orientation so as to affect motion perpendicular to the field.
     
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