07.10: Contact forces are examples of which of thkoh6oxlb8 1inu . gr;(e fundamental forces?

  99.02: Which of the following terms is NOT related cp e.nhqtvg4( q.qt 3m)z .ei)nonceptually to the others?

  02.20: The graph shows the relationship bety fob-1. .cgtqween the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph-..1gq tocy fb is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. Thre/1.ee f, irve magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from b.rf1ee/ie rv ,lock B?

  14.04: Three equal masses are suspended frrm6f z6y.bw qceavj7w8ixn .5 0u+mo5om a classroom ceiling by a series of strings as shown in the j.amw6q .758i+6u m5c xebvyrz0nwf o figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k rfz/ 7,/gui* iucgfcouj47*x。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string cojr7ii *ug*guf uc7zo4c/f,x / nnecting the masses?

  14.13: Which one of the following scientists is most associated with the fol*bu6k;4ncqd4cze1-h2qu8gc:x yb wu lowing statement: “For small displacements of an object from equilibrium, there is a restoring force that is pkz4ncb*u1qu dw4q -:uxy2g ;ecc6bh8roportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is e2nyk8xu:bch+ og+6i / o1z4t zay- ywlxerted at an angle of b+6oz-culta yyzn/ i 1wxoy8gh:k2+4 $\theta$. 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 rough horizontal floor at constant zfb gj2p/123h x +9ge jmlo7isspeed by means of a force P as shown tojgfm2bgz3x o 7lse2pj ih+/91 the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which pivd44z50 6 e8 lrgsc,z*p+th2z,fu0d ztkj b case is the 42z4btgdjeisuzc,tzprvl +05zf68k ,p 0 *hd string most likely to break?

  96.39: Assume the objects in the following diagrams have eqv(qvit,bpog(-+f fw gj: ( 2bvff:a8wual mass and the strings holding them in place v(+wipf2gj,v ag(bb :fw ot 8:fqf-( vare identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whiqcy8v 2epblg + d3uo)4y-e) krch one of the following choices must be toey 4+bpy3vlucg 2k8 eq)-)drrue of the force F, provided by the person onto the object? W represents the magnitude of the gravitational force acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg massdhc qjfvu)pk 6aq*rrv* jq*/s2,i ((z moves along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3. fiqs qvza)u(j k2 jc,* hvd*6rpq*/(r0 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 pushedvqv )mjfzaxtu skv 61v:/g,,3 to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates unif6/gvka1uv,jxmz)v svt q, 3 f:ormly 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 i12m2xzrwf c9 /p el+ato the right is sliding to the right along the floor. A horizontal force of 10.0 N is being frxi/cwpa 2e+ 2lz91mapplied to the right. The coefficient of kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined at i95 gba7szv 82ng et6tan angle of $30^{\circ}$ 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 u khz4b9 5i,/3 uwmbpisiw;dw5m0i 7rsteel plate as shown in siwb3;09izph7/k 5iw5 b,m uwmui4rdthe diagram A.
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 incline that makes the angle θ with the horuoty6(je n ..hizontal. The block remains at rest a.yj(6n htu .eos 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 planeci56it.gkh5e:w 7sx w inclined at an angle of $30^{\circ}$ 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 o ;0ba /3ce9p g p))xae7 hhmco*c*ef3lf5gwlb n a second plane (where friction is significant) in inclined at eg lmb;*w7he f5 )c03ga 9*c/hapx)pcl3be fothe 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 planjnkx px- d-e1k/cy*i)5 nl c/q1r5m a .yty3ine has a gravitational force of magnitude N 10 acting on it/3/npyc -cx q rdnnkmaxj1 eiyyt51ik. 5l-*) 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 incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is b vv ,7mbxc 4so5znk2: teed,3pbx0k)neing pushed at constant speed on an inclined plane. The free body diagram 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 relationscnn4)b kz0oms pd 7ex3vv :tk,e, 5x2bhips between

  08.20: A person pushes a block of mas -ux5u.dxxe oy3fs3 z5,lrrh 9s M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclinoxfx-x,59rdhs.yzlu 33 5r ue ed $30^{\circ}$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 inclined planevsw n d42c-zx3 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 owz n43sc- dx2vf 38 N. The coefficient of static friction between the block and inclined plane is 0.92. Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from res n5yq47t ungw:t at the top of a frictionlesy4t nunwq:g5 7s incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?