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how much force ks required.to.keep 780 n box moving at constant velocityu across.the floor if friction force betwern the bix and the floor is 160 N

Sagot :

Answer:

Explanation:you must first make a free body diagram of the block to place all the forces that act on the block there. You will have four forces. The normal force, the weight, the horizontal force in x (which is what they ask to calculate) and the friction force. Then you raise the equations and you clear the values. I attach the solution.

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