A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks a
ID: 2197311 • Letter: A
Question
A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling large vegetables and pianos as a sport. A simple trebuchet is shown in the figure below. Model it as a stiff rod of negligible mass, d = 2.70 m long, joining particles of mass m1 = 0.115 kg and m2 = 71.0 kg at its ends. It can turn on a frictionless, horizontal axle perpendicular to the rod and 12.0 cm from the large-mass particle. The operator releases the trebuchet from rest in a horizontal orientation. (a) Find the maximum speed that the small-mass object attains. m/s (b) While the small-mass object is gaining speed, does it move with constant acceleration? Yes No (c) Does it move with constant tangential acceleration? Yes No (d) Does the trebuchet move with constant angular acceleration? Yes No (e) Does it have constant momentum? Yes No (f) Does the trebuchetExplanation / Answer
the rod length given (2.8m) is the total length, including the .15m length between the pivot and the large particle. So, the length between the pivot and the small particle would be (2.8 - .15) = 2.65m. Changing your 2.85's to 2.65s reduces your answer to 23.97m/s
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