2. which of the following statements are true? A body in equilibrium :
(a) must be at rest
(b) must move with uniform acceleration
(c) must have uniform linear and roatry velocity,
(d) cannot be acted upon by several forces
(e) must have the sum of the upward forces acting upon it just equal to its weight.
3. a crane boom of negligible weight is 20 ft. long. it makes an angle of 30-degrees with a vertical mast. the tie rope, fastened from the upper end of the boom to the wall, makes an angle of 90-degrees with the boom. the maximum tensile force that the rope can safely stand is 5.0 tons. what is the maximum load the crane can suport and the thrust in the boom for this load? solve by both an analytical method and a torque method.
Answers:
Why when you've shown no effort on your own? This is a HELP site, not a DO site.
I submit that you can easily find the answers to these in your textbook or class notes.
Well, school has started.
Exciting, isn't it?
You better turn off MySpace and your iPod for an hour and get started on learning how to do your own homework or you will cripple your problem-solving abilities for years to come, princess.
No one is going to spoon-feed you the answers. The idea is for *you* to work, and *your* brain to learn.
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