# A Decsription of Torque

1221 WordsAug 12, 20135 Pages
Torques Introduction During this lab you will become more familiar with the concepts of torque. The purpose of this lab is to determine if the rotational equilibrium condition, Στ = 0, holds experimentally. Equipment Meter stick (1) - no metal ends Fulcrum (1) Clamps (4) Weight Hanger (1) Mass Set (1) Digital Scale (1) Theory For a body to be in static equilibrium, two conditions have to be met: ΣF = 0 and Στ = 0 where F is force and τ is torque. (The torque is the force times the lever arm, r) The first condition, ΣF = 0, is concerned with translational equilibrium and ensures that the object is at rest or is moving at a uniform linear velocity. The second condition, Στ = 0, is concerned with rotational equilibrium and ensures…show more content…
Major mistake - Calculations will be way off. 14a Torque A RGC.doc -3- DATA TABLE Mass of the meter stick: mmeter stick __________________(grams) Mass of the Fulcrum Clamp: _________________(grams) Mass of Clamp with V-wire: ________________(grams) Mass of Weight Hanger: __________________(grams) Balancing point (center of mass) of meter stick, x0 = ____________(cm) Values Case 1 m1 = 100 g m2 = 200 g x1 = 15 cm x2 =_________ Moment (lever) arms r1 = ___________ r2 = ___________ Results *(see note above) τcc = ___________ τcw = ___________ % Diff. __________ Case 2 m1 = 100 g m2 = 200 g m3 = 50 g x1 = 20 cm x2 = 60 cm x3 = _______ r1 = ___________ r2 = ___________ r3 = ___________ τcc = ___________ τcw = ___________ % Diff. __________ Case 3 m1 = _______ x1 = 10 cm m2 = 200 g x2 =_________ r1 = ___________ r2 = ___________ m1 ____________ (measured on scale/ accepted) m1 ____________ (calculated, experimental) % Error _______ Case 4 m1 = 100 g x1 = ________ r1 = ___________ r2 = ___________ τcc = ___________ τcw = ___________ % Diff. _______ mmeter stick = _________ xo = _______ xo’ = _______ (new pivot point) 14a Torque A RGC.doc