Aweaver+Lab+18-+Torque+and+Rotational+Equilibrium

Torque and Rotational Equilibrium:

__**Case III: Unknown Mass- the Balance Principle:**__ Mass B: 267g Mass D: 276g Mass E: 218g Mass F: 208g Mass R: 147g

((Actual-Expected)/Expected) *100 Mass B: 3.68% Mass D: 1.8% Mass E: 5.7% Mass F: 5.7% Mass R: 11.03%
 * Percent Error:**

__**Case lV: Meter Stick with One Mass:**__ x=.243m m1=100g m2=?

(.1)(.243)=(m2)(.257) .946=m2 Approximate mass of meter stick: 94.6g Actual Mass: 92.1g

Percent Error: (94.6-92.1)/94.6=2.64%

__**Lab Questions:**__ 1. Torque depends on both the force and the length of the lever arm. A large force can produce little or no torque if the length of the moment arm is very small. A small force can produce a large torque if it is applied to a moment arm with a greater length.

2. The support force is not included in torque calculations because there is no net upward force on the meterstick. It is balanced, and therefore the downward force exerted on the support must be equal to the upward force exerted by it. If there is no net force, it will have no effect on the torque so it's left out of the calculations.

3. (220)(35)=(120)(50)+(m)(1)