flea can jump to amazing heights- as high as 30 m straight up, about 100 times t
ID: 1657284 • Letter: F
Question
flea can jump to amazing heights- as high as 30 m straight up, about 100 times the flea's length. A) for such a jump, what take off speed is required? B) how much time does it take the flea to reach maximum height?flea can jump to amazing heights- as high as 30 m straight up, about 100 times the flea's length. A) for such a jump, what take off speed is required? B) how much time does it take the flea to reach maximum height?
flea can jump to amazing heights- as high as 30 m straight up, about 100 times the flea's length. A) for such a jump, what take off speed is required? B) how much time does it take the flea to reach maximum height?
Explanation / Answer
a)
d =30 m
vi = ?
vf = 0 m/s (because at maximum height speed is 0)
a = -9.8 m/s^2
use:
vf^2 = vi^2 + 2*a*d
0 = vi^2 + 2*(-9.8)*30
vi^2 = 2*9.8*30
vi^2 = 588
vi = 24.2 m/s
Answer: 24.2 m/s
b)
use:
vf = vi + a*t
0 = 24.2 - 9.8*t
t = 2.47 s
Answer: 2.47 s
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