link to physic lap if needed http://www.physics.qc.edu/files.php
prelab 10.
a) Look at the diagram in theBasic Concepts part of the lab, under Equilibrium. Two forces acton opposite ends of a uniform rod of mass m and lengthL, in opposite directions. The rod is supported by afulcrum at the center, which is the axis of rotation. The force andtorque exerted by the fulcrum on the rod are
F = mg + F,Ï = 2FL
F = mg + F,Ï = FL/2
F = 0,Ï = 0
F = 0,Ï = 2FL
F = mg,Ï = 0
F = mg,Ï = 2FL
F = 0,Ï = FL
F = mg + F,Ï = FL
F = mg,Ï = FL
F = mg + F,Ï = 0
F = 0,Ï = FL/2
F = mg,Ï = FL/2
b) In procedure 2, you balance the ruler. Ifthe density of the ruler increases without changing its dimensions,the ruler will
tiptoward m1
beunbalanced, but the direction depends on the hanging masses, themass of the ruler, anddistances
tiptoward m2
still be balanced
c)In procedure 3, you balance the ruler. If the density of the rulerincreases without changing its dimensions, the ruler will
tip away fromm
still be balanced
tiptoward m
beunbalanced, but the direction depends on the hanging mass, the massof the ruler, and distances