The mass moment of inertia I of a disk is given by 1 I mr² where m is the mass of the disk and r is the radius. Create a graph that shows I as a function of r for a steel disk with a density of 7800 kg/m³. Vary the r value from 10 cm to 25 cm. Assume a thickness of 1 cm.

Question 9 In the figure, a 119 kg uniform log hangs by two steel wires, A and B, both of radius 1.20 mm. Initially, wire A was 2.70 m long and 2.05 mm shorter than wire B. The log is now horizontal. Young's modulus for steel is 2.00 × 1011 N/m². What are the magnitudes of the forces on it from (a) wire A and (b) wire B? (c) What is the ratio dд/dB? (a) Number i Wire A Wire B com Units (b) Number i Units (c) Number i Units --/1