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Q. The arm of a crane at a construction site is 14.4 m long, and it makes an angle of 40° with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces at the base of the arm.
(a) What is the magnitude of the maximum torque the crane can withstand if the maximum load the crane can handle is 385 N?
(b) What is the maximum load for this crane at an angle of 15° with the horizontal?
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A 100 kg cannon at rest contains a 10-kg cannon ball. When fired, cannon ball leaved the cannon with a speed of 450 m/s. What is the recoil speed of the cannon.
A crate of 31.9- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 345. After that you must reduce your push to 247 to keep it moving at a..
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