13.47: Which one of the followk*zicpkhpk1g aymhz6:mqw5h31w2- 3 ing choices best represents the magnitude of the angular momentum of the Earth (expressed in base MKS units) associated with its rotap3h1qc5: z3w kz-gmhhpkky 61w*m2i ation about its axis?

  17.37: Which one of the following r0mgh8n.ogl9op 8r/)lx xq+n9 ys a3t choices best approximates the magnitude of the Ear9ms8 lor0x.o grpnq+xghy9/)3t8nal th’s angular momentum (expressed in base MKS units) associated with its orbit around the Sun?

  11.40: A 2.0 kg particvv(qqdr0:pd 1 c2io m j sug1g*8te(gf4 hqk;/le travels at a constant speed of 5.0 m/s along the line shown in the figure. What is the magnitude of the particle’s angular momentum calculated from the origin(2r/ *(vg:vo qdgfcq4i e ( sht0qgm1pu8 j1;kd unit: $kg.m^{2}/s$)?

  11.35: Mary rides her bicycle directed due South. She applie xp:u .qayeqr mz(pijy8,9/j /s the brakes quickly bringing the bicycle to rest with the wheels rolling without slippim (r:qupxj/p ejyy.qa8/ z9i,ng on the ground. Which one of the following choices best represents the direction of the angular acceleration of the bicycle’s front wheel while it is slowing to rest from Mary’s point of view?

  03.41: Two uniform spheres of 38cjl:qogay ;zn:bl,n tg0)omass M have radii R and 2R. Each sphere is rotating about a fixed axis through a diameter. The rotat0ltqn3)g lz: ac8ojnog ;,y :bional kinetic energies of the spheres are identical. What is the ratio
of the magnitude of the angular momenta of these spheres? That is, $\frac{L_{2R}}{L_R}$=?

  05.49: Two solid disks are made of the same material. One disk has radius;ymz l-sjhkc a6p9(3r R while the other disk has radius 2R. Both disks are rotating about a fixed axis perpendicular to the disk, through its center. Given that the disks hav-p6zam(;sjc3l 9rykhe equal kinetic energy, what is the ratio of the angular momentum of the disks $\frac{L_{2R}}{L_R}$

  17.24: What condition must btc);u 5 itf5phw-.qj5dj ,cj ie met for the angular momentum of a system to be constaptud5-jctw) hi.,qjjfc5i 5 ;nt?

  01.27: A spinning ice skater can increase his rate of rotatx8 i ,h2 x3lxie0f mgr9 nn+*rvr2ng:wion by bringing his arms and fremw xn3r:2r8hxirf+gn,l g 0iv2e x* 9ne leg closer to his body. How does this procedure affect the skater's rotational momentum and kinetic energy?

  03.32: A figure skater has a moment of h kji+oole*4uw,i /;s(p. udb inertia of $5.0 kg.m{2}$with her arms outstretched. If she begins a spin at 2.0 rad/s with her arms outstretched and then brings her arms in tight to her body, her rate of spin increases to 8.0 rad/s in 3 seconds. Friction and wind resistance can be considered negligible.
What is the change in the skater's angular momentum as she brings her arms in tight to her body?

  0.33: A figure skater has a moment of ineahi)67ubd hz75n, v zertia of $5.0 kg.m^{2}$ with her arms outstretched. If she begins a spin at 2.0 rad/s with her arms outstretched and then brings her arms in tight to her body, her rate of spin increases to 8.0 rad/s in 3 seconds. Friction and wind resistance can be considered negligible.
What is the skater's angular acceleration as her arms are moved in during the three second interval?

  06.23: An object m, on the end of a string, mob )48rl ypslb kslx5:h,pqn: n mu(,5hves in a circle on a horizontal frictionless table as shown. As the string is pulled veyn)h5bms :ppl5:sql ,,bn h uk lr8x(4ry slowly through a small hole in the table, which of the following is correct for an observer measuring from the hole in the table?

  08.40: A point particle of mass m collides wqv ai6i0rmo7.ith a thin rod pivoted at one end. The rod has mass M=a r7voi06 qm.i2m, length L , and moment of inertia $I=\frac{1}{3}ML^{2}$ . The particle moveshorizontally with speed V when it hits the bottom of the rod and sticks to it. What is the speed of the particle immediately after collision?

  09.42: A uniform, solid disk with mass M and radius R is rotating a1u:07 xf bnrqon a fixed, frictionless platform with constant angular speed ω0 about a fixed axis through its center. A second uniform solid disk of mass 2M and radius R/2 is placed from rest directly on top of the first disk so that the centers of the disks line up. When equilibrium is established, the disks are spinning at tr:b qa 71funx0he same rate. What is the angular speed of the disks at equilibrium?