Physics

posted by .

When the dried up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.2 m/s at an angle of 60.0° above the horizontal.
If the seed pod is 0.8 m above the ground, how long does it take for the seed to land? (Neglect air resistance.)
What horizontal distance does it cover during its flight?

  • Physics -

    Vo = 2.2m/s @ 60 deg.

    Vo(v) = 2.2sin60 = 1.91m/s.

    Vf^2 = Vo^2 + 2gd,
    d = (Vf^2-Vo^2) / 2a,
    d = (0-(1.91)^2 / -19.6 = 0.186m,up.

    Vf = Vo + gt,
    t = (Vf - Vo) / a,
    t = (0 - 1.91 / -9.8 = 0.195s,up.

    d = 0.8 + 0.186 = 0.986m above ground.

    d = Vo + 0.5gt^2 = 0.986m,
    0 + 0.5*9.8t^2 = 0.986,
    4.9t^2 = 0.986,
    t^2 = 0.20,
    t = 0.447s, down.

    T = t(up) + t(down) = 0.195 + 0.447 =
    0.64s to land.

    Vo(h) = 2.2cos60 = 1.1m/s.

    d(h) = 1.1m/s * 0.64s. = 0.704m = hor
    distance.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. biology

    1. What adaptive advantage did seeds provide -------------------------------------- Notes: Embryo is protected in a seed. The seed is modified for dispersal which is good b/c…. Once landed, the seed can remain dormant until… The …
  2. Physics

    When the dried-up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.64 m/s at an angle of 30.0˚ below the horizontal. The seed pod is 0.465 m above the ground. How long does it take …
  3. geometry

    elbert wants to plant grass seed in his backyard. His yard is shaped like a rectangle that is 6 meers by 7 meters. He plans to use a cup of seed for every square in his yard. How many cups of grass seed will he need?
  4. Physics

    A seed shoots out from the pod with the speed of 2.4 m/s but with a direction of motion 30° below the horizontal. The seed pod is initially 1.2 m above the ground. (a) How long does it take for the seed to land?
  5. science review

    since tomorrow is my test. Please check: seed coat- skin covering the seed to protect the inner parts Hilum- ?
  6. Math

    Elbert wants to plant grass seed in his backyard. His yard is shaped like a rectangle that is 6 meters by 7 meters. He plans to use a cup of seed for every square meter in his yard. How many cups of grass seed will he need?
  7. Biology

    Different types of plants may be angiosperms, vascular seed, vascular non-seed, or non-vascularplants 1) Short grass meadow----I def. know it's not an angiosperm but can it be vascular non-seed 2) Magwort---im debating if it's non-vascular …
  8. Science

    A dicot seed is preferred over a monocot seed to observe seed structure because?
  9. Biology

    Assume you had a round seed garden pea plant and you wanted to find out whether the round seed plant was homozygous or heterozygous. What would you do?
  10. math

    A city plans to plant grass seed in a public playground that has the shape of a triangle with a height of H = 50 m and a base of B = 24 m. Each bag of grass seed will seed 120 m2. How many bags of seed should be purchased?

More Similar Questions