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Question #2a2ef

1 Answer

Jul 21, 2017

#K=4kJ#

Explanation:

#F=ma =>a=F/m=>a=20/5=4m/s^2#

so the velocity is : #v=at=4*10=40m/s#

The kinetic energy is then :

#K=1/2mv^2=1/2*5*40*40=5*20*40=4000J=4kJ#

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