Question

and Angular Momentum e magnitudes of the torques they roduce on the particles about the ori- in, greatest first. is tne ner torque on tne parucie (aj zero, (o) posiive ana con- stant, (e) negative and increasing in magnitude (>0), and (d) negative and decreasing in magnitude (t> 0)? What happens to the initially sta- onary yo-yo in Fig. 11-25 if you pull it ia its string with (a) force & (the line f action passes through the point of ontact on the table, as indicated), b) force F (the line of action passes Figure 11-25 Question 3. the counterclockwise direction): (a) the angular momentum of the 7 A rhinoceros beetle rides the rim of a horizontal disk rotating counterclockwise like a merry-go-round. If the beetle then walks along the rim in the direction of the rotation, will the magnitudes of the following quantities (each measured about the rotation axis) increase, decrease, or remain the same (the disk is still rotating in 320 CHAPTER 11 ROLLING, TOROUE, AND ANGULAR MOMENTUM beetle-disk system, (b) the angular momentum and angular veloc ing to the magnitude of the angular momentum of the particle ity of the beetle, and (c) the angular morpentum and angular velocity measured about them, greatest first. of the disk? (d) What are your answers if the beetle walks in the di rection opposite the rotation? 8 Figure 11-27 shows an overhead view of a spin like a merry-go-round about its center at O. Also shown are seven paths along which wads of bubble 6 gum can be thrown (all with the Figure 11-27 Question 8. same speed and mass) to stick onto the stationary slab. (a) Rank the paths according to the angular speed that the slab (and gum) will have after the gum sticks, great- est first. (b) For which paths will the angular momentum of the slab (and gum) about O be negative from 1 gular slab that can-+ o d (4,-1) Figure 11-29 Question 10. 11 A cannonball and a marble roll smoothly from rest down an

Question 7.

Answer 1

a) are mo ectemal tenues Total an Ay- Same b te beetle Song daste the beetle a moswasnit um decメeases momentum -) しbeetle decreated