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How to do this physics question...

[From: ] [author: ] [Date: 11-08-31] [Hit: ]
Upon leaving the barrel, a dart has a speed of 13 m/s. Assuming that the dart is uniformly accelerated, how long does it take for the dart to travel the length of the barrel?d=1.once you have a,......
The length of the barrel of a primitive blowgun is 1.2 m. Upon leaving the barrel, a dart has a speed of 13 m/s. Assuming that the dart is uniformly accelerated, how long does it take for the dart to travel the length of the barrel?

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you first need to find the acceleration from

vf^2=v0^2+2ad

vf=final velocity =13m/s
v0=initial velocity =0
d=1.2 m
a to be found

substitute values and solve for a

once you have a, find the time from

dist = 1/2 at^2 or t=sqrt[2 d/a]
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