Match {alphaa, alphab, alphac, fbc, fab} to the correct gear system knowing gear a weighs 1 lb and has a radius of gyration of 1.3 in; gear b weighs 6 lb and has a radius of gyration of 3 in.; gear c weighs 9 lb and has a radius of gyration of 4.3 in. knowing a couple m of constant magnitude of 40 lb ⋅ in is applied to to the pictured gear, (ignore direction of the forces, choose the correct direction for alpha's - positive or negative):

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Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.