- #1
Matt_Theta
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Homework Statement
After a wild ride on a windsurfer, you head to a lifeguard tower to fly a kite. You stand on the tower, which is 3 meters above the ground and release your kite. You let out 10 meters of string and the kite begins moving according to the following equation:
y(t) = (0.9 m/s3)t3-(7.5 m/s2)t2+(13 m/s)t+10m
Homework Equations
a) How far above the ground is the kite when it begins to dive?
b) How far above the ground is the kite when it begins slowing while descending?
c) Does the kite hit the ground? If not, how close does it get?
d) What is the acceleration of the kite as it passes you while speeding up?
The Attempt at a Solution
Answers: a) 19.43m; b) 10.51m; c) No. It is 1.64m above the ground; d) -17.28 m/s2[/B]
I completely agree with the answers for parts a-c. However, no matter what I do, I keep getting -12 m/s2 for part d.
I'm looking for a sanity check.
Thanks!
-Matt