a bullet emerges from a barrel of length 1.2m with a speed 640 msassuming const. acceleration the approx. time it spends in the barrel?
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Const. acc means velocity will not chng wth tym ....and initial vel.is 0
at = v - u
at = 640 - 0
at =640..........(1)
S = ut + 1/2 at2
1.2 = 0+ 1/2 (at ) t
using (1)
1.2= 1/2 640(t)
1.2 = 320 t
t = 0.0037 ...ans
at = v - u
at = 640 - 0
at =640..........(1)
S = ut + 1/2 at2
1.2 = 0+ 1/2 (at ) t
using (1)
1.2= 1/2 640(t)
1.2 = 320 t
t = 0.0037 ...ans
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