Question

Rotation and Forces Lab Problem An experiment is done to determine the Mol of a pulley. The pulley is in the shape of a disk. The setup is as shown below: lolo The following data are collected: m2 = 1.853 kg; m, = 0.155 kg; r = 5.11 cm. The mass m, is held motionless and released. It is timed as it falls for a distance of 0.350 m ten times. The following times are collected: 1.23 s; 1.35 sec; 1.15 sec; 1.25.sec; 1.22 sec; 1.20 sec; 1.31 sec; 1.37 sec; 1.15 sec; 1.26 sec. A. (1 point) Draw free-body diagrams for each of the three objects in the experiment. B. (1 point) Develop an expression for the theoretical acceleration a of the two masses in terms of l, m, m2, r, and g. C. (1 point) Develop a theoretical expression for moment of inertial of the disk in terms of a, m, m2, r, and g. D. (1 point) Calculate an experimental value for I based on the data collected. Calculate an experimental mass of the disk. E. (2 points) The disk is removed from its support and the mass of the disk is found to be 2.25 kg. Give three explanations for why your experimental mass is different from this. Explain how the assumptions you made might have contributed to this.

Answer 1

Padd all 3 equations Tatmig-T,+T, -T2 Camling - mza+miat I h. I al 2 0.35= 1x ax 1.2492 a=0.45ms? I=10 155 49.8 avreten x0.0511 I= 3.5114103 km2 mig = (m2 + m + 7 / 2 a Lous0155-1-833) 1 xa → Tz mig mitm2 + To=mza - I X2 mig-Ti-mia- (mitm2) a 011 - 2x3.5718103 Coosi kg (T, -72) r= I'd - I = (mig - m.me) 82 Ti-T2 2 I m = 2.735 leg 1 V1 123+1 35 + 15 +1.25 + 12271:20 + 1.31 + 1.37+ 1.1st 1.26 = 1.2ug

I hope it helps you.

Thanks for asking.