Question

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Answer 1

Answer:

the force of friction between the surface of a floor s the surface of a box in contact with the floor in 200 n we wish to move the box on the floor with constant nelocity how much force has to be applied on the box is muscular force

Answer 2

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The force of friction between the surface of a floor and the surface of the box in contact with the floor in 200N. We wish to move the box on the floor with constant velocity. How much force has to be applied on the box..?

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As here the box will move with constant velocity if no external force acts on the body .Thus, the Effect of force of friction is to be Balanced .So a force of equal to the force of friction that is 200 N but opposite in the direction is to be applied on the box to move it with a constant velocity . So, the applied force on the box is 200 N .