The figure shows a uniform, horizontal beam (length = 10 m, mass = 25 kg) that is pivoted at the wall, with its far end supported by a cable that makes an angle of 51 with the horizontal. If a person (mass = 60 kg) stands 3.0 m from the pivot, what is the tension in the cable?
a.
0.83 kN
b.
0.30 kN
c.
0.38 kN
d.
0.42 kN
e.
3.0 kN
Question 2A mass
m = 4.0 kg is connected, as shown, by a light cord to a mass
M = 6.0 kg, which slides on a smooth horizontal surface. The pulley rotates about a frictionless axle and has a radius
R = 0.12 m and a rotatinal inertia
I = 0.090 kgm
2. The cord does not slip on the pulley. What is the magnitude of the acceleration of
m?
a.
2.4 m/s2
b.
2.8 m/s2
c.
3.2 m/s2
d.
4.2 m/s
2 e.
1.7 m/s2
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