07.10: Contact forces are examples of which of the fundamental forbti82 )7ulo xqces?

  99.02: Which of the follopn0v sc8)edn7q*.v:s;j u p4yh0bwgnwing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationshi-qq : os7zhd5*vv+vg zp between the mass of a number of rubber stoppers and their resulting weight on soz:s*5q d7vh+v-qovzg me far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on+q 4ig g;f7uto:wok)l,pb2m a a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact forcew g qf4l+ 2 gb:k,mu)api;o7ot on block C from block B?

  14.04: Three equal masses are suspended from a classroo)g) b+dhdon/ e4 p;l.et;eyf wm ceiling by a series of strings as shown in the figure. Which string )+ ;weebo yh tp/dl). ;enfgd4has the greatest tension?

  16.05: In the figure shown, the mass m = 0hs8v*mc(bs:tioew/ 6.0 k。and the mass M = 14.0 k。are stationary. The m( /eoshv mt8cis*0 b:wass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with thepu)4 +n.s 3ch. sg lsfvp(;vqv following statement: “For small displacements of an obj..f3 l uvhc+sqvsp (;n4 g)psvect from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanx r5ia 2knrc;16egu/fying figure, a force F is exerted at an angle of 5a/ eiu kf;6c1grn x2r$\theta$. 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 a m6 lbp hk:2hezgd)qfa50 d(f3(q,h fut constant speed by means of a force P as shown to the right. Which of td bkp fg2:f(al 60 zuh3dqhme )5h,fq(he following must be true?

  99.08: A weight can be hung in any of the fol7hm ejq j+r,i8lowing four ways. In which case is the strin8, qjjrihm e7+g most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass w :6 fblw;:fyyand the strings holding them in place are identical. In which case would the l bf: wf6;wyy:string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which onv 5 dim+;mz3gte of the following choices must be true of the force F, provided by the person onto the objezg m3im 5+;dtvct? 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 mass moves along the x-axis, at one instant of time, the mass/ 7ri +egh5 h0 bbvar1qwjf or)d+9es+ has position 2.0 m, velocity 3.0 m/s,and accelera)+bqgj 5rre 0b9w/fs ho+rivad+ 1he7tion $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushed to the rid *. (4wz5 emoapql2ieght on a rough surface by a horizontal force of 15 N 5o2zlei .wd( 4 q*pema as shown, during 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 ivsk+ozd;f, )mu18inxhqz:d+; rtp a 1wja*g 6 s sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient o+)u1dz1pa*s6,vfz+dk8:j;q ot xiarg hn mw ;f kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat yq9i05+gsyd dplane inclined at an 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 /ugz 1r8do os m7d6pz.a horizontal steel plate as shown in the diagram A. ug/1zrd.dso87pm 6zo
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 owe ca4 l)cids8.+vp4veio /;on an incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly inc;+i p)s8 vd.e low44cov/aiecreased. 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 an fr,;s 9g8i d qgkzbwed1-8m,mxch8b2gle 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 on a second plane (where friction is s -t fgqb;t1h(nignificant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between tgq-1t (nftb ;hhe block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force ofu*qj:qiwe 1 rtklk,e2 w 1w4d+ magnitude N 10 acting on it from the Earth. Whkkwew* jwu er, d:1lq iq2+4t1ich 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 being pushed at constant speed on an inclined plane. The8fmtgwe1la cnlq4prc;-b3 q6 h3)e5t free body diagram of;qph)4lcg b3m lcntq6tw 3f 8er 51-ae 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 bloc94llb xcbf pj+m; 6ah:k of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat sumxpjclbab+4 f;h l96: rface 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 inclined p(bewt+y pzho6g m b+5(lane 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 one of the following choices best repw (b+botp(hg6 5e+ ymzresents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the t 7/yfmp+n;3ys qcg ru8op of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at rest u/q;npg cym+ f3y8s7ron a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?