07.10: Contact forces are examples of whi5*9.fblpndb 9ake 7dpch of the fundamental forces?

  99.02: Which of the following terms z.fge1v e-(yyvu)(/0 verkzc is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a numbesw2:30 dcs5jpfoc .qz r of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representati jodp 3zwfq2s:s0.5ccon of the:

  10.15: Three blocks, labeleec 7kj 3*jnb9md A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is tk97*j bmnjc3e he magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended fykbfym le .w 5ku;rqd o(99j0;rom a classroom ceiling by a series of strings as shown in the figure. Which string has 9jeur. km ;wo9fdq y k;0bl(5ythe greatest tension?

  16.05: In the figure shown, the mass mray 7 xx bmeijo;)(0x8 = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the follobyejx7oam0i ;r(8x x )wing choices represents the tension in the string connecting the masses?

  14.13: Which one of the following czl k3 hs70lvi gev2;-scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to tc- vk2s g0v73 heli;zlhe displacement.”?

  94.26: As shown in the accwk .ie zz7rp:1ompanying figure, a force F is exerted at an angle of kezp.1zrw7i :$\theta$. The block of weight mg is initially moving the right with speed $v$. The coefficient of friction between the rough floor and the block is $\mu$. The frictional force acting on the block is:

  95.34: A student pulls a wooden box along a roi70 /ksb;t1+ham;y i byw8lsd ugh horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be trued8mt ak i0hyb si/ws;17 ;+lyb?

  99.08: A weight can be hung in any of the followingcrhmyu jb/em+)h9 *- eenil; ;fo/4zd four ways. In which case is the string mosm/ eed jc4 9buif;lhorze+ n; *m)y-h/t likely to break?

  96.39: Assume the objects i6zebz(e2s8u ;zrxs kmnvs(xlt0; 1 ;e n the following diagrams have equal mass and the strings holding them in place are identical. In which case would bvz2 xns (6et re8 ;;ems0xsuk1(;lzzthe string be most likely to break?

  16.10: A person wishes to accelera8 j*y9y srr2hpr bjht )vu819bte an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of the gravitational ub hb*2ys9j8j h 1t8rp9rryv)force acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axi/-in93hbk h + kx+h:dx mqc: :oxq8mm2/z xflvs, at one instant of time, the mass has position 2.0 m, velocity x-moq/n+3zd:9+b8 kxmhxlc2 vhfmkq :i:/h x3.0 m/s,and acceleration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is puivbvb2,rtx1f6 os, +o(s h/sz shed to the right on a rough surface by a horizontal force of 15 N as shown, durs +vihvo,sfo ( /r6bxzs 2t1b,ing the push, the object accelerates uniformly to the right at 2.5 $m/s^{2}$ . What must be the magnitude of the force of friction also acting on the object during the push?

  96.32: The 10.0 kg box shown in the figure to the right is slid ny,(d9ns11hk v bzm14dksevl9: rl5aing to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the box and the floor is 0.20.ky,snd alkv1z95nrm dv4b(h:s9el1 1 The box is moving with:

  00.32: A block rests on a flat plane inclined at an angle of m4dx8)zvgpmj:2b xu 9+dy 3h8x6eau z $30^{\circ}$ with respect to the horizontal. What is the minimum coefficient of friction necessary to keep the block from sliding?

  99.32: A wooden box is first pulled across a horizontal steel plate as shown +rt.jk 2zb oy:*) beznin the diagram A. 2bebnt+o .zy zjk ):r*
The box is then pulled across the same steel plate while the plate is inclined as shown in diagram B. How does the force required to overcome friction in the inclined
case (B) compare to the horizontal case (A)?

  07.09: A block rests on an idgc1mm r yks7 3/:ui7nsxt 22kncline that makes the angle θ with the horizontal. The block remains at rest as g1sr:7i7d3yts 2m uc2x /mnkk θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle of aw56t:bv evul8kbi vp .o +wy9ww. q:6$30^{\circ}$ to the horizon as shown in the diagram below.

What would be the acceleration of the block down the plane assuming the force of friction is negligible?

  01.12: If the block is placed on a second pla9 hvc2;1tyvovne (where friction is significant) in inclined cv;t1vohyv2 9at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational fortl mm6r 7,u-zzce of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordinate axes shown in the figure? The y-axis is perpendicular to the im6 lzm-rz ,u7tncline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined plane. The fr86avazezs t gp:d+7 5b., jcihee body dia5zdj7seatica:+vh .p86b z ,ggram of the object is shown with the gravitational force represented by W, the friction force by f, the applied external push parallel to the incline by F, and the normal force with the surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0lubx*1- 5kn (ubsluq. kg with a constant speed of 5.0 m/s straight up a flat surfa-nsbu *.l(lb k1 xq5uuce inclined $30^{\circ}$above the horizontal. The coefficient of kinetic friction between the block and the surface is μ = 0.40. What is the net force acting on the block?

  14.20: A uniform block of mass misplaced on an ixjusgd3r g 9d5t+qxx8p p- *0nnclined plane of angle θ . When released, the block does not move. It is determined that the normal force acting from the incline on the block has a magnitude of 62 N while the force of static friction acting on the block has a magnitude of 38 N. The coefficient of static friction between the block and inclined plane is 0.92. Which 89t5rpq-g dxn*jdp 0xu3x +sg one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a fricy;ty u +jfs;wow,s u;ly5mx63tionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as fxj+6y,w;ty3uuw os;ls ;m 5ythesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?