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physics

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A projectile MUST____. List all that apply.

a) experience a net downward force
b) have a constant speed
c) be accelerating
d) be changing its velocity
e) be moving downward
f) have a horizontal motion in addition to a vertical motion

  • physics -

    a,c,d are required by gravity.
    b is never true, unless the projectile is sitting on a table or riding in a box in a train car
    e is true only if dropped or shot downward
    f is not true if shot straight up, or down. Hmm Actually, it does have horizontal motion in those two cases, the horizontal motion is zero. Zero in fact is a valid horizontal motion. So if you want to argue with your teacher, include f.

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