Lab Manual 2005

3. Can you rewrite the equation from the previous section (question 3), to take the angle ofaction into account?Part 3Purpose: In the previous experiment we developed the notion of torque as the product of aforce perpendicular to a lever and the length of the lever arm. We did this by keeping alever balanced, i.e., no rotation around the pivot. That is the clockwise torque equalled thecounter clockwise torque. In part 3 we explore this aspect of equilibrium by setting up asystem with an unbalanced lever and then calculating the total torque acting on it.Materials:1 metre stick, a lever clamp without stirrup, 2 clamp holders with stirrups, triplebeam balance, hanging masses and a lever stand.Procedure:• Place the lever clamp without stirrup on the 60cm mark of the metre stick and then placeit in the lever stand.→ Provide a controlled torque by placing a 200g mass at 20cm from thepivot, on the short side.→ Determine where, on the long side, a 100g mass would have to be placed to balance themetre stick.• Make a detailed drawing of your balanced lever.• Calculate and tabulate all clockwise and counter-clockwise torque around the pivot.(Note that a combined mass for the weight and stirrup must be used for all calculations.)Are the clockwise and counterclockwise torques balanced? If not, why?- 60 -