Question

a simulation was used to recreate the lab.

Toys for a Torque Weighted Ruler 1. Set up a balanced weighted ruler system with two different known masses suspended in cradles at different positions on the same side of the meter stick, balanced by a third unknown weight, warunk on the other side, keeping the pivot at the center of the ruler. Weigh the hanging scales, clips, and masses. You will use torques to determine the weight of the unknown, Wink. First weigh the ruler and cradles. mnanger-1 = = 5 kg. Mungu 2 5 kg Map - Mop 2 = NA Molo-3. = NA mclip-for pivot = N/A Madded to hanger 1 = NA Madded to harger-2 = NA Em = 2. Draw an extended force diagram for the ruler showing each of the forces w and each of their position vectors d from the pivot. (Don't overlap vectors!) Force Diagram 3. Calculate the the torques t using T = wdsin. Then sum the torques T to determine the value of the unknown mass by using Newton's 1st Law in rotational form, Tnet = 0. Τη (Is T1 cw or cow? + or -?) d = W1 = T2 (Is T2 cw or cow? + or -?) d2 = W2 = T3 (Is T3 cw or cow? + or -?) d3 Warunk=_? Tret What is the value of this unknown mass as calculated from torques? What is the value of this mass as measured by a scale? kg What is your percent error? 4. Be sure your forces balance. What must Fnet equal? Fnet = Thus, what must Fpivot = ? How is this related to Em?

Answer 1

<-- 100 ... Le-0.75...) K. - 1.25m IL E = W₂ Fawi F z = W3 W, = (5x9-8)= 49W di=0.75m T= wid=36.75 Nm W = (5x9-8) = 490 dz=1.75m T2 = W₂d₂=85.75 Nm WzN dz=1.25m 73 =Wz dz=(1-25 W3) N-m now we must have, T3= 7, +7 for perfect balance (36.75+85.75 98N ine, Wz = Condition. 1-25 -- so, W3=98 N = 10 kg and T3 = 122.5 Nom

so the value of unknown mass = 10 10 kg Percentage Mcalculated erro0 = mtrue mtoue X1001 the value of more should be measured by the scale in the simulation.

(4) w Fact = total force on the bar = F + E + F3 or Fret = (49+49+98) N = 196 m So, Epivot - 196 N =(Em) g že Epivat - (m, + M2 + Mg) g (5+5+10)9.8 = 196 M F net
​​​​​​Note - For Questions no 3, The value of this mass as measured by scale = m_{​​​​​​true} . You have to measure the unknown mass in simulation then put it in my percentage error formula.