A wrecking ball (weight = 5400 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3800 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°.(adsbygoogle = window.adsbygoogle || []).push({});

what i have done which i guess is wrong is.

L*5400 - Lsin(32)Ft + 1/2Lsin(48)(3800)=0

and then i got rid of the L's

and got 5400 - sin(32)Ft + 1/2sin(48)3800=0

but this was wrong, if you could just explain to me how to do this it would really help a lot thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Stuck on these boom problems

**Physics Forums | Science Articles, Homework Help, Discussion**