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Answers (1)
a) W=m*g*h W=(4.20kg)(28.0m)(9.8m/s^2)=1152J b)K=1/2*m*v^2 & v=sqrt2*g*h v=sqrt(2)(9.8m/s^2)(28.0m)=23.4 m/s K=(1/2)(28.0m)(23.4)^2=7665.8J c)23.4m/s d)no. e)yes. Air resistance would do negative work f)yes. Air resistance would do negative work
