6. page 95, A5-kg mass is connected by a string to a 4-kg mass, and the string passes over a massless frictionless pulley so that the 5-kg mass sits on a tabletop and the 4-kg mass hangs straight down. If the system is static, what must be the frictional force acting between the tabletop and the 5-kg mass? AN at equilibrium 49 N Fe= 9.8x9-88.2 N >FF Umg 5-9.8=49 N 39.2 N √mg4•9.8=39.2 N

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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.