3. With the meter stick oriented such that the zero end is on the left and the 1

Question

3. With the meter stick oriented such that the zero end is on the left and the 100 cm end is to the right, place the knife-edge clamp at the 50 cm position of the meter stick with the screw pointing down, and place this set-up on the fulcrum. (See Fig. 9-1.) Carefully adjust the fulcrum position by moving the knife-edge clamp until the meter stick is balanced: the meter stick should be horizontal. Record the position. This position is xcm.

4. Measure and record the mass of the hanger clamps. Place a clamp at the xcc = 15 cm position and another clamp at the xc = 75 cm position. Place 200 g on the clamp at 15 cm and enough mass on the clamp at 75 cm to make the system balance (static equilibrium). If small fractional masses are not available to you, it may be necessary to adjust the position of the 75 cm clamp in order to balance the system.

Given the mass of the weight hanger clamps (16.5 g per clamp), calculate the amount of mass necessary to balance the apparatus in part 2 (Quantitative analysis of torque) of the procedure (see steps 3 & 4). Draw a diagram and show all work. Note that in torque calculations, distances of interest are perpendicular distances from the applied force to the axis of rotation (i.e., the fulcrum).

Explanation / Answer

3. With the meter stick oriented such that the zero end is on the left and the 1

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