A floodlight with a mass of 40 kg is used to(adsbygoogle = window.adsbygoogle || []).push({});

illuminate the parking lot in front of a library.

The floodlight is supported at the end of a

horizontal beam that is hinged to a vertical

pole, as shown. A cable thatmakes an angle of

11◦ with the beam is attached to the pole to

help support the floodlight. Assume the mass

of the beam is negligible when compared with

the mass of the floodlight.

The acceleration of gravity is 9.81 m/s2 .

a) Find the force FT provided by the cable.

Answer in units of N.

2056 N

b) Find the horizontal force exerted on the

beam by the pole. Answer in units of N.

c) Find the vertical force exerted on the beam

by the pole. Answer in units of N.

I got a and b but for some reason I can't get c.

My work.

Fynet=0=Tsin11+Fy-mg where Fy is the vertical force exerted on the beam by the pole.

Tsin11+Fy=mg

392.4 +Fy=392.4

Fy=0

however, that doesn't work

anyone has suggestions for part c?

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# Homework Help: Torque problem, please help

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