A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks 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 = 3.35 m long, joining particles of mass m1 = 0.115 kg and m2 = 73.5 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. find the maximum velocity that the object attains im 10% outside the correct value please someone help me i get 7.842 m/s but if someone could please let me have the right answer. 5 stars thanks!!!

Explanation / Answer

Torque about the pivot = (73.5*9.8*0.15 - 0.130*9.8*2.80)*cos(?) So the work done is integral (73.5*9.8*0.15 - 0.130*9.8*2.80)*cos(?)d? (evaluated from 0 to p/2) = 104.5J Work = ?K = 1/2*I*?^2 where I = 73.5*0.15^2 + 0.130*2.80^2 = 2.67kg-m^2 So ? = sqrt(2*W/I) = sqrt(2*104.5/2.67) = 8.847rad/s So v = r*? = 2.80*8.847 = 24.8m/s

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.