A grinning oddball of mass m stands a distance d from the bottom of a stationary ladder having mass M and length L, as in the figure. What is the magnitude of the friction force that the floor exerts on the ladder? Assume the wall is frictionless and let m = 58 kg, M = 19 kg, L = 3.7 m, d = 1.6 m, and D = 1 m. 25 d L m D→ N M

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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.