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How much Thermal Energy is Created?

Marissa drags a 22 kg duffel bag 16 m across the gym floor. If the coefficient of kinetic friction between the floor and bag is 0.15 , how much thermal energy does Marissa create?

Known variables:
mass (m)= 22 kg
drag (s)=16 m
coefficient of kinetic friction=(μ) .15
gravity (g)= 9.8

thermal energy equation: μ*m*g*s
μ         m         g          s
(.15) x (22) x (9.8) x (16)
\Delta E_{Th} =520  J

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