If the dresser is sliding with a constant velocity, find FFF, the magnitude of the force that the person applies.

Complete Question

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The force is  

Explanation:

Generally the magnitude of the force the person applied is equivalent to the kinetic frictional force acting on the dresser

   So  

Here N is the normal force acting on the dresser at point  P and  Q  that is  

So

Generally this normal force is equal to  the mass of the dresser multiplied by the acceleration due to gravity so

Hence  

magnitude and direction