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February 28, 2015

February 28, 2015

Posted by **Eva** on Friday, August 31, 2012 at 10:13pm.

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 -
**Charrice**, Friday, August 31, 2012 at 11:37pmtime 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 -
**JoJo**, Thursday, November 15, 2012 at 12:28am4!

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