Quote:
Originally posted by Mr.Wong
Ok, time to school.
x= x(not) + v(not)t + .5 at^2
x(not) = 0
v(not)= 40
t = 30
a = -2
t = 30
300 meters.
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your calculations show that the train would be going backwards from seconds 20(excluded) to seconds 30(included)
we both know that this cannot be true if the person uses the BRAKES
