Question: A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.50 m long

A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.50 m long and weighs 500 N. At a certain instant the worker holds the beam momentarily at rest with one end at distance d = 1.50 m above the floor, as shown in Figure by exerting a force P on the beam, perpendicular to the beam.

(a) What is the magnitude P?

(b) What is the magnitude of the (net) force of the floor on the beam?

(c) What is the minimum value the coefficient of static friction between beam and floor can have in order for the beam not to slip at thisinstant?

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a The angle between the beam and the floor is sin dL sin 1525 37 so that the angle b... View full answer

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