Question: In the figure, a constant external force P = 140 N is applied to a 20-kg box, which is on a rough horizontal surface.

In the figure, a constant external force P = 140 N is applied to a 20-kg box, which is on a rough horizontal surface.

In the figure, a constant external force P = 140 N is applied to a 20-kg box, which is on a rough horizontal surface. The force pushes the box a distance of 8.0 m, in a time interval of 8.0 s, and the speed changes from v1 = 0.4 m/s to v2 = 2.4 m/s. The work done by the external force Pis closest to: 20 kg 8.0 m

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