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posted by Sheetal on Thursday, February 23, 2012 at 1:19am.
A 0.168kg hockey puck slides at 11.4m/s. what is the work needed to stop the puck?
The work is equal to the change of kinetic energy W=ΔK=K2-K1= 0-(mv^2)/2 W=0.168•(11.4)^2/2=10.9 J.
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