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physics

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A pelican flying along a horizontal path drops
a fish from a height of 3.3 m. The fish travels
8.7 m horizontally before it hits the water
below.
What was the pelican’s initial speed? The
acceleration of gravity is 9.81 m/s
2
.
Answer in units of m/s

  • physics -

    time to travel horizontal distance (8.7m) = time to fall vertical distance (3.3m)

    (a) solve for t in the vertical direction
    (i) initial speed in vertical direction is 0 m/s
    (ii) d = (initial speed in vertical diection)t + 1/2 g t^2
    3.3 m = 0 + 1/2(9.81 m/s) t^2
    (iii) solve for 't'

    (b) calculate initial speed using
    horizontal distance = initial speed in horizontal direction x time
    (i) 8.7 m = initial speed x time
    (ii) solve for initial speed

  • physics -

    4!

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