PHYSICS 8A Study Guide - Midterm Guide: Fot, Massat, Volt-Ampere
Document Summary
The see-saw shown at the right consists of a triangular base and a bar with a 90o bend 2 m from the pivot point on its right side. A point-like 10 kg mass sits atop the bent arm of the see-saw bar at a position that is at an angle of30o above the horizontal from the pivot point. A point-like 3 kg weight rests on the left side of the see-saw 3 m from the pivot point. Assume that the see-saw bar itself is massless and not rotating (in other words, it is static). a) b) c) d) e) Make a free body diagram of the see-saw bar. Use the convention that clockwise torques are positive. Fn,,= \?^) = 3vr. 3 lv, . ft\,3 (-, ,, h (60")=zvvt. ,"l. - t n c l - t) f r r l l t t ? ( 0 t u v.
