07.10: Contact forces are examples of which of the fundamentalx-xbsr7 7j s(l forces?

  99.02: Which of the following ter* od yhn4z+3xw,icd9rms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a b mwlx fmc, nuw6t6mk/ x,k+9t58g u-dnumber of rubber stoppers and their resulting weight on some far-of-6 xxfln mm6tt5uwckb 8gkwdm,+,/u9f planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magnitu3ip g83f..df6gt bob 1s.iwj;pgh 9 zqde of the gravitaj. ipgw bis3t;o.qf8g6b9. g p1z3hfdtional 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 mf*a *ztbejan9),uoi6 asses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tensi6itnja e9ab),*of u*z on?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M =yat,t 6)qw :us 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represe6:tsaq)tw ,y unts the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associate1ldwu roo8o5 u ue-4(ed with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the ew1 o(8orouul4e- du5 displacement.”?

  94.26: As shown in the accompanying figu u8xzqfci9a;*o0wh:dcc:a8 yre, a force F is exerted at an angle of y8:xazu ;icqd0fawh :c* c 98o$\theta$. 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 pd+ 8z)hn vv-talong a rough horizontal floor at constant speed by means of a force P as sh)v+ zdn-h8vpt own to the right. Which of the following must be true?

  99.08: A weight can be hun ck budgmqn0 0b 4-0hw,,klwv10 a+eihg in any of the following four ways. In which case is tuh-00, kh1 lwcime40 gbwnkvq ,dab+0he string most likely to break?

  96.39: Assume the objects in the f p:rs 62wa s.uxa1n4sa:tfgk)ollowing diagrams have equal mass and the strings2u n rs:.4wx6a 1:kps a)gftsa holding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upwardy)2btj* csrp9 uniformly. Which one of the fo*)tpj29sy b rcllowing choices must be true 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 mass moves along the x-axis, at one instant of time, the masslgyalruo*,;uc a5 o9* has position 2.0 m, velocity 3.0 m/s,and acc *9uogl;ar*5luyoc ,aeleration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object i ro1 5lo5xnnqur 2+(9sk p3veis pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to theoil+nn2r kop v 5rqx359(esu 1 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 ta((dqsej vi3u:y nqkm+ 2a.v 7he right along the floor. A horizontal force of 10.0 N is being applied to the right. The coeais n2 k(uqj3q+7a.vdme : y(vfficient 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 inclq/)e +m:r gebmined 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 a horizontaltj 9jg cl ihyzzfw1,74h ed063 steel plate as shown in the diagtjw i4f6z1c 7jh0gy9el3zhd, ram 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 thcgqn49pj. cwzr+ +q 8mnfl. r9e horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal forc.rf+wmj9zr49qn p cqg c.+ 8lne and the static frictional force of the incline on the block

  01.11: A 5 kg block rests onm3ryhk87994 f frs nrr a flat plane 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 on a second plane (where friction is pn arf1fu/ u4x95s s4(lxn:zo significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is t/4xfupxn9f uz:n4 s1(osl5r a he force of friction between the block and the second inclined plane?

  08.08: An object on an inc5 -, jiz-a+xr iwkf:sxlined plane has a gravitational force 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 incline’s surface while th fazi:jr-sk +w-x5,i xe x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined pla8 eaff21;xdtrne. 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 foldtf xr1a;e f82lowing choices represents correct relationships between

  08.20: A person pushes a blocz*x ;o 794u8 3gp uzkkt:iceebk of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface incl9xi8u 4 ubeze g7;kkztco:p3* ined $30^{\circ}$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 inclbt cg*ge2vk0 av,:5 .) aipypzfte7y+4kyq0 uined 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 of the following choiu t52gkep *pa,q4vyz t0 iyybk:a0+vfeg)c7.ces best represents the mass,m, of the block?

  17.40: A small object of mass M is released f6 lakkihl2j6: rom rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at res kk :j62lhl6aiton a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?