Net Work and Constant Kinetic Energy
A 20 kg box is pushed across a horizontal floor by a constant 80 N force. The coefficient of kinetic friction between the box and the floor is 0.30. At what speed must the box move for its kinetic energy to remain constant?
A
26.2 m/s
B
13.6 m/s
C
4.0 m/s
D
0 m/s
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