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Math Help - Particle in a straight line!

  1. #1
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    Particle in a straight line!

    Hi

    Have a question that i am having trouble getting my head round, wonder if anyone can help?

    Q. Choose the two option that are always true about motion of a particle in a straight line.

    A. The speed of the particle is the magnitude of it's velocity.
    B. A particle that has zero acceleration and zero velocity must be at the origin.
    C. A particle with negative position must have a negative velocity.
    D. The acceleration of any object always decreases.
    E. A particle which remains stationary has zero velocity and zero acceleration.
    F. If two particles have different velocities, then at some time in the future they will collide.

    I think E is correct and B, C are incorrect but not sure!

    Can anyone help!

    Thank you

    Matt
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by n33712 View Post
    Hi

    Have a question that i am having trouble getting my head round, wonder if anyone can help?

    Q. Choose the two option that are always true about motion of a particle in a straight line.

    A. The speed of the particle is the magnitude of it's velocity.
    B. A particle that has zero acceleration and zero velocity must be at the origin.
    C. A particle with negative position must have a negative velocity.
    D. The acceleration of any object always decreases.
    E. A particle which remains stationary has zero velocity and zero acceleration.
    F. If two particles have different velocities, then at some time in the future they will collide.

    I think E is correct and B, C are incorrect but not sure!

    Can anyone help!

    Thank you

    Matt
    A and E are always true, the rest are not (always true).

    RonL
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  3. #3
    Newbie
    Joined
    Aug 2007
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    Hi mate

    Many thanks. that question has been bugging me for ages.

    Matt
    Follow Math Help Forum on Facebook and Google+

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