SOLUTION: hey, help me in my task please, thank you? A construction crew wants to hoist a heavy beam so that it is standing up straight. They tie a rope to the beam, secure the base,

Question 1202143: hey, help me in my task please, thank you?

A construction crew wants to hoist a heavy beam so that it is standing up straight. They
tie a rope to the beam, secure the base, and pull the rope through a pulley to raise one end
of the beam from the ground. When the beam makes an angle of 40o with the ground, the
top of the beam is 8 ft above the ground.
The construction site has some telephone wires crossing it.. The workers are concerned
that the beam may hit the wires. When the beam makes an angle of 60o with the ground,
the wires are 2 ft above the top of the beam. Will the beam clear the wires on its way to
standing up straight? Explain your answer.

Will the beam clear the wires on its way to standing up straights?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
The beam take a circular path and length of beam as the radius.
In triangle ADG
AD = 8/sin 40
= 12.45 ft.
In triangle AMB
sin 60 = MB / AM
MB = 12.45 * sin 60
MB = 10.78
The cables are two ft above
10.78+2 = 12.78 ft
The length of ladder is 12.45
the beam clear the wires on its way to
standing up straight.

.

RELATED QUESTIONS
construction crew wants to hoist a heavy beam so that it is standing up straight. They... (answered by ikleyn)

construction crew wants to hoist a heavy beam so that it is standing up straight. They... (answered by mananth)

Hi I really need help with these questions please. Could someone show their solution too... (answered by richwmiller)

hey thank you for your help, well okay its really not a formula that i need solved its... (answered by ankor@dixie-net.com)

an electric hoist is being used to lift a beam. The diameter of the drum on the hoist is... (answered by Fombitz)

a construction crew (answered by ikleyn)

Hey, my name is Michelle. I need to find out what the variable is in the question... (answered by stanbon)

hey i really need help in this problem it is really hard.. my problemis 3k^2-39k+90 i... (answered by venugopalramana)

Hello amazing tutors! May I please have help in solving this please? If you have time to (answered by josgarithmetic,greenestamps)