movs JESTION 4-50 Points The following question is about Newton\'s second law ap
ID: 1730725 • Letter: M
Question
movs JESTION 4-50 Points The following question is about Newton's second law applied to the equilibrium situation of an extended object (not a point particle object). A 3.0-m-long rigid beam with a mass of 100 kg is supported at each end, as shown in the figure. An 80 kg student stands 2.0 m from support 1, on the left. The question is to find how much force 6 ewot 0 the beam. Suppo 1) Choose the object of interest: just Support 1 the student, just the beam, both student-beam together, student- beam-supports together as a single object? 2) Draw and label the vectors obytt mwest idén t-beam-supporis togu 3) Write down Newton's second law4)T,m o 4) Write down Newton's second law representing the forces on the object of interest. for translational equilibrium of the object. for rotational equilibrium of the object. Find the force exerted by support 1. Find the force exerted by support 2. 5) 6)Explanation / Answer
Newton’s second law forces:
n1 + n2 ? mg ? Mg = 0
Newton’s second law torques:
n2*(3 m) ? Mg*(1.5 m) ? mg*(2 m) = 0
Do algebra
n1 = 751.3 N and n2 = 1012.7 N
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