A 37.5 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor

Question

A 37.5 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. the work done by the applied force 607.5 J the increase in internal energy in the box-floor system due to friction 496.125 J the work done by the normal force 110.25 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. J the work done by the gravitational force 5.94 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. J the change in kinetic energy of the box 496.125 Your response differs from the correct answer by more than 100%. J the final speed of the box 5.94 Your response differs from the correct answer by more than 100%. m/s

Explanation / Answer

c)0 no work done d)0 no work done e)0.5mv^2=0.5m(2as)=mas=37.50.66*4.5=111.375 f)v=2.437

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