- #1
student54321
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Homework Statement
Jumping straight up, how long will a kangaroo remain in the air if it jumps through a height of 3.0m?
Homework Equations
d=vf(t) - 1/2 a (t)2
I Think?
The Attempt at a Solution
Defined all variable
d=3.0 m
a=9.81 m/ss
vf=0m/s2
then:
d=vf(t) - 1/2 a (t)2
3.0=0 - 4.905(t)2
0.61=(t)2
t=Square root of 0.611
t=0.78
I got the wrong answer. But when I multiplied my answer by two I got the right answer. Don't know why so I'll need some help here.
And I know I skipped some calulation steps in my answer, I have them written on paper.