Question

A ladybug crawls along the radius of a rotating compact disk of mass M = 0.015 kg and radius r = 0.06 m (ldisk = Mr²/2). The pivot is frictionless and the disk is initially rotating with angular speed wa = 31.416 rad/s. The ladybug starts at the outer edge (Figure A) and ends at center (Figure B). At the end of the ladybug's travel the disk rotates with angular speed wg = 31.510 rad/s. WB Figure A Figure B For this system angular momentum is conserved. O (a) True O (b) False O (c) Cannot be determined What is the mass of the ladybug? (a) mib = 11.216 mg O (b) mib = 7522.500 mg OC) mib = 89.731 mg O (d) m = 45.000 mg O (e) mib = 22.500 mg

Answer 1

1.

Con system external Texto lo, Angular momention will be conserved. (True) [0.01 0.015 X(0.06) + Muly (0.06}] 31.416 = + 2 2 X 31.51 + 10 kg = 22.5x10 gm lady na 22.5X10 2 22.5 mg Aus