- #1
Shay10825
- 338
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1.) A uniform rod AB is 1.2 m long and weighs 16 N. It is suspended by vertical strings AC and BD. A block P weighing 96 N is attached at E, .3 m from A. The tension in the string BD is?
http://img116.exs.cx/img116/2822/STATICS1.jpg
I did:
(.3m)(96N)+ (.9m)(16N) - (1.2 m)(x) = 0
x=36N
But the answer is 32 N
What did I do wrong??
2.) A 960 N block is suspended as shown. The beam is weightless and is hinged to the watt at A. The tensions in the cable BC is?
http://img116.exs.cx/img116/364/statics2.jpg
I did:
(4m)(960N)=t
t=3840
The answer is 1600 N.
~Thanks
http://img116.exs.cx/img116/2822/STATICS1.jpg
I did:
(.3m)(96N)+ (.9m)(16N) - (1.2 m)(x) = 0
x=36N
But the answer is 32 N
What did I do wrong??
2.) A 960 N block is suspended as shown. The beam is weightless and is hinged to the watt at A. The tensions in the cable BC is?
http://img116.exs.cx/img116/364/statics2.jpg
I did:
(4m)(960N)=t
t=3840
The answer is 1600 N.
~Thanks