07.10: Contact forces are examples of which of the fundamental forces? nxla ;08x5/msihkm j4

  99.02: Which of the following terms is NOT related conceptually to theuaf um30vy5 ,m others?

  02.20: The graph shows the relationship between the mass ofx w6m;em8-3 *,: d,nyvodqwi rhogku0 a number of rubber stoppers and their resulting weight on some far-off planet. The 6d;: mn- wgeory*xk,vm h8 iw0 q,du3oslope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, wh6 ew: kmp//ga2y+yo and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the ma /y/egomhap6:y 2+kwwgnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling ofn 6k;o:* wvfby a series of strings as shown in the figure. Whi:ffn *6vko ;woch string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。a6- 46nke vqevind the mass 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 coen- ve 6q6ki4vnnecting the masses?

  14.13: Which one of the following scientists is most associated with the folv:bjnho.yg0zh g; x:9lowing statement: “For small displacements of an objecthj.:9v ngb:ozh; y gx0 from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted 8(cj sczcc+w ;at an angle of c;c(j+cc8 wzs$\theta$. 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 alo3i 2/6zub nvd,j1 ; hnno0atrgng a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be true?0j nnt;/ndb ,vo3 uir2ah g6z1

  99.08: A weight can be hung in any)8j*v1t uca qgxy )i:r of the following four ways. In which case is the string most likely to break8)g 1r*jx q)tic:uvya?

  96.39: Assume the objects in the following diagrams hhp8s 1o dg3;*jlerep 84d0r7ra tpq0+qqw3 qsave equal mass and the strings holding them in place are identical. In which case would the string be most likely 3 73rtpqre1a w0qsl*j 4+r0h s8g;p qod8qdpeto break?

  16.10: A person wishes to accel),ja.n6 okjwmerate 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 re,wnakj .ojm) 6presents 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 tj ug0o6ymk.a-he x-axis, at one instant of time, the mass has position 2.0 m, va.mguyk06 j o-elocity 3.0 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 pushed to the right on a rough surface by a horizoyka l6mrcarm;s yid3k65 7ip)v:7,p yntal force of 15 N as shown, during the push, the objl k5,ird i7 )ak;yc: mvypymrsp6736a ect 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 )ealcgrur90s w -p 2f6is sliding 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 0.29 fgr06w)acr-ple su 20. The box is moving with:

  00.32: A block rests on a4wckyth msj 182r96axf ;s5zk flat plane 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 a horizontal steel plate as show31yb 9 mw8sf3 qx0ztqg)-tes ,xfb(vtzm3 t- qn in th-t s y9wmbx 3)b3t ,1(emtzfz0fv 8-qqgq 3xtse 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 r.yx85y cfkn(θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of 5ny (yfx8k. crthe incline on the block

  01.11: A 5 kg block rests on a flat plane 9,kl-wdw4uj vf5(:weil m k :cn35mwqinclined 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 td:3hk n5h p(ez7 u,riplaced on a second plane (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 friction between the block and the second inclined plre, 7uk:nzh dt 5i3p(hane?

  08.08: An object on an inclined plane-12 w 2dd * 4cmf-lsiobdcdz(w 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 surcm2d w2b1-d *i (o dc4lfs-dzwface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speedgd br9.x)l)/ awa1x rq/e:ye7k4zod v 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 l): ea1x/wqdarvygxedz /orbk) 497. 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=6.0 kg with a cons-tq o)fh:6dc6qphu;ltant speed of 5.0 m/s straight up a flat:tc 6o-;d hu)qh6fqp l surface 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 m77qjcd3qsf4o pb9rmi 7 j..bzass misplaced on an 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 frictjoif3.7j dq7m. p9qzc 4brb7sion 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 releasedl;wsai7m .w 53lr(lip from 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 reston a table as thesmall object slides. During the slide, what is the magnit( 35;li7sr.a miwlpwl ude of the normal force from the table on the incline?