A 873.8 N painter needs to climb d=1.76 m up a ladder (measured along its length from the point where the ladder contacting the ground), without the ladder slipping. The uniform ladder is 13.47 m long and weighs 387.34 N. It rests with one end on the ground and the other end against a perfectly smooth vertical wall. The ladder rises at an angle of theta=42.8 degrees above the horizontal floor. What is  friction force in unit of N that the floor must exert on the ladder? Use g = 10 m/s2 if you need to .

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.