ass7 - Practice Problems 7 1 Three masses are connected by...

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Practice Problems 7 1 . Three masses are connected by massless rigid rods. Rods AC and CB have length l = 12.1 cm. If m A =141.0 g, m B =205.0 g, and m C =311.0 g, what are the coordinates of the center of mass? Answer: 9.50e-02 m 3.78e-02 m ( x coordinate first, followed by the y coordinate.) 2 . A 3.50 m long rigid beam with a mass of 110.0 kg is supported at each end. A 84.4 kg student stands 1.64 m from support 1. How much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.) Answer: 9.80e+02 N 9.28e+02 N 3 . A 3.42 m long ladder leans against a frictionless wall. The coefficient of static frictin between the ladder and the floor is 0.440. What is the minimum angle, in radians, that the ladder can make with the floor without slipping? Answer: 8.49e-01 rad
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4 . A baseball player holds a 37.8oz bat (weight = 10.5 N) with one hand at the point 0 as shown in the figure below. The bat is in equilibrium. The weight of the bat acts along a line
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This note was uploaded on 12/12/2011 for the course PHYSICS 1D03 taught by Professor N. mckay during the Spring '08 term at McMaster University.

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ass7 - Practice Problems 7 1 Three masses are connected by...

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