A 20.0-N box rests on a 50.0-N box on a perfectly smooth horizontal floor.When a horizontal pull to the right is exerted on the lower box (see figure),both boxes move together.Find the magnitude and direction of the net external force on the upper box.

Question

A 20.0-N box rests on a 50.0-N box on a perfectly smooth horizontal floor.When a horizontal  pull to the right is exerted on the lower box (see figure),both boxes move together.Find the magnitude and direction of the net external force on the upper box.

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The Answer of A 20.0-N box rests on a 50.0-N box on a perfectly smooth horizontal floor.When a horizontal  pull to the right is exerted on the lower box (see figure),both boxes move together.Find the magnitude and direction of the net external force on the upper box.

A 200-N Box Rests on a 50