- #1
smith5029
- 8
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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°.
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.
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.