07.10: Contact forces are examples of wf i2z9y p -yk4zv**mx iv6nrewg2))vnhich of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to thernmr1hbzd /f7rzkn,kcww.- mv)3 o:8 others?

  02.20: The graph shows the relationship between the mass o3*a/so. va1ymvps/ ta z qx6,gf a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representav6,zotav*sgq3 ./1aa /py sxm tion of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a tablep q +(zgie;7iy n*) c5f/wm4bobcd1vh . The magnitude of the gravitaibv ; )eo7*z+p5mf(yhgci4dwc qn1/b tional force on each block is indicated on the figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are susk;g30 ctg d(vypended from a classroom ceiling by a series of strings as shown in the fi0(y vgktc 3;dggure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mas4 bcd3ne3afo 22lsv 4nq4m*tc s M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the massese 2m*c24ad 3 3qnft4vsocnb4l ?

  14.13: Which one of theu9 clexjz2e)6 .p jpc5 following 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 the displac6cp 5)lze2pjc.u9jx e ement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an l3 i rw,p2x) c 8idyx)dp-z;wrojsk05angle of 3rwpsid82jkz5)ol )-i0 ,rxy;xcd wp $\theta$. 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 w3iswa9+e,gc10r uk csfrx5 f/ooden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the follxiwksu3rf95/0c1, rg ac f +esowing must be true?

  99.08: A weight can be hung in any of the following fzj phfcenmbbe683f9zh -8q33 our ways. In which case is the string most likely to zcfhhe3zm 9ne-f63pb83 qbj8break?

  96.39: Assume the objects in the xvl;bs -:goz ws616jrgv yc12following diagrams have equal mass and the strings holding them in place are identical. In which case 16ov2j6b1xcg ;y: gzs-wr vls would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whvxq 01v.rt g.mich one of the following choices must be true of thev 1.tqvx0.mgr 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 mass moves along the x-axis, at one instamb(po,(l3cw3n iql:+t iay 3)cgi9 m ant of time, the mass has position 2.0 m, velocity 3.0 m(l3abtwcn l3ig c3ymp:q+ m 9i(),iao/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 pu- zq1*+yoob46raat krc5a k)q shed to the right on a rough surface by a horizontal force of 15 N as showarkotab4*+zyo 1kqr56a- q )cn, 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 is sliding to trm2unxrfumh xmx *+ p *+t-z(+he right along the floor. A horpnx-uhmxmf* r(*ux m 2+t++ zrizontal 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. The box is moving with:

  00.32: A block rests on a flat plane inclined at an ang8ucj:u (nyof fe xtr8 7*+ndq4le 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 pullei l6er (s5jzf3d across a horizontal steel plate as shown in the dia3r6e(z5 jifsl gram 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 hojda 1w9ube6p)sq)8 lv rizontal. The block remains at rest as θ is sep8)wj 9 1ba) slvq6udlowly 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 ineq6ie op4.hw:wxr. )bclined 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 on a second plane e8z 6(kldw7cl(where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frd l k(ec6w8zl7iction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitatiog+yj( ,c a-m0oobck i:nal force of magnitude N 10 acting on it from the Earth. Which of the following,koc a: mg+-ijbc(0 yo 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. The 8nwmyec. mr-na53s.v 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. Whicsrec5n y3. ma n.mvw8-h one of the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5.0wqo34j u *vu7s qdqqp2/o d(a( m/s straight up a flat surface incli soqu(/pw*4(quoaq jq2 vd3 7dned $30^{\circ}$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 apxh vi7,q t-a 4cu:q2dn inclined 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 one o 2v,qq7 upd t:ca-hx4if 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 ofuoy3v0st,8 tt a frictionless 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,tu3ot 0s,tvy8 what is the magnitude of the normal force from the table on the incline?