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Question #9cde2

1 Answer

Jan 27, 2017

#6s#

Explanation:

Find the acceleration using N"L then use one of the constant acceleration eqns

#F=-50N" "m=20kg#

N2L

#F=ma#

#-50=20a=>a=-50/20=-2.5ms^(-2)#

using #v=u+at#

#0=15+(-2.5t)#

#t=15/2.5=6 s#

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