Lab This picture shows how the brackets should be attached to the ends of the me
ID: 776487 • Letter: L
Question
Lab This picture shows how the brackets should be attached to the ends of the meter stick. Notice that the bracket is half on and half off with the end of the meter stick smack dab in the middle of the bracket Read the following procedure carefully. After reading the entire procedure, you may begin the lab. 5) At your table there should be a meter stick, lab stand, fulcrum, four brackcts with hangers, one bracket with no hanger, spring force scale, cylindrical masses and some blocks of wood. Place the bracket with no hanger on the end of the meter stick that reads 0-m. The bracket should be as close to the end as possible. Place the fulerum on some blocks of wood so the meter stick will be high enough so the hanging mass does not touch the table Place a bracket with hanger (on the bottom) on the meter stick. Place a second bracket with hanger at the 1-m end of the meter stick with the hanger on top. Place the spring force scale on the lab stand and hang the I-m end of the meter stick from the spring scale. Place the 0-m end of the stick on the fulcrum. Finally, adjust the height of the spring scale so a. that the meter stick is horizontal. The set up should be as in (4) b. Notice that the spring scale already reads a force. Since this is the force exerted by the meter stick itself, and is acting I meter from the pivot point, it is numerically equal to the torque exerted by the initial set up. This torque will always be present and is referred to as the "tare value" c. For part I: Place the bracket at 0.75 m. Record the tare value in the lab manual. Hang the masses indicated in the manual from the bracket. For cach mass, record the scale reading d. For part 2: Move the brackct to each location indicated in the lab manual. At each location record the tare value, then place the 1.0-kg mass on the bracket and record the scale reading For part 3: Place two more brackets with hangers on the meter stick. Record the tare value. e. amount of mass, but be Place masses on each bracket. It is your choice as to position and careful not to overload the spring scale. Record the masses and their locations in the table. Record the total scale reading 6) Fill in the following tables with the values you found in the lab. Part ID) Place the following four different masses 0.75 m from the axis of rotation of the meter stick. 28Explanation / Answer
7) The calculated Torque and measured torque should be as close as possible for least error.
Calculated torque= mass x g x distance of mass bracket from fulcrum
e.g. calculated torque = 0.2 x 9.81 x 0.75 = 1.4715 Nm
Measured Torque = scale reading x 1m = 2.25 x 1 - 1 = 1.25 Nm
8) As applied force doubled and the distance is still 0.75m thus the calculated Torque will double.
9) As load is constant and lever arm keeps doubling the calculated torque value will keep doubling.
10) Measured torque value are not matching the calculated value, which may be due to human error while noting down scale value, fault in scale(the spring may not be exactly linear).
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.