Question #3b038

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Answer 1 · 2017-11-07T20:37:02

12 sec

Consider this formula:

#D = v_it + 0.5at^2#

The initial velocity #v_i# is ZERO

Since the first term of the equation canceled,we can work out the time by using the second part.

#D = 0.5at^2#

#t^2 =D/(0.5a)=(2D)/a#

#t =sqrt((2D)/a)#

plug in the numbers into the equation to get the answer.
#t=sqrt((2*245)/3.44)=11.93...# (s).