07.10: Contact forces ar 6kkm1e 6cqn+-km6dtt e examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptux)v.2-z uwtna:7h yxo ally to the others?

  02.20: The graph shows the relationship between the mass of a numberr9omh , qf j4/of3vnw ;wn88wm of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of theoh4;8 3,nvmq8w/9 wj rowfmnf:

  10.15: Three blocks, labeled A,B, and C, remain710kc8hl;wa jm*nlu il6c(uj at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C frou(0j;6 m*7wcj cl1lanu h il8km block B?

  14.04: Three equal masses are suspende8-c +7 sncvrnsce.e+t) bgu1id from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tension? 1e 7si.bc)+8-+evngnctucs r

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = xw-1vv 0-stfc 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents th vvscwf-1-0 txe tension in the string connecting the masses?

  14.13: Which one of the following scientists isqn4 0acl pumf9-c16cv most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displf-l 0 9vcc61qapn4cmuacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle of e)0-eox7 dcuk;nb+ at,kdbj-jknbe;x-ua0+ o,ekc d-) d bt7$\theta$. 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 h;xw/ zado) ,tt.aqnm on tgh n2k.)8;norizontal floor at constant speed by means of a force P as shown to the right. Which of the following m/gnh2k,n;.x dntt) oz ; aa.m8ot w)qnust be true?

  99.08: A weight can be hung in any of the followingglb qavk+: l9crt3p69kn g/,c four ways. In which case is the stri6 +c/:9 ctkg llbkn, vgra9pq3ng most likely to break?

  96.39: Assume the objects in the following diagrams have equal m-z nf2rf 4jrwvv+*xs li9i3)0rw:jy s ass and the strings holding them in place are identical. In which case would t-w sjw2rz0:r fxyv ili*9rv3 fn)4 +sjhe string be most likely to break?

  16.10: A person wishes to accelerate an obje36xn tg qu-w44cr/ *7f sh;jbrtk h/scct upward uniformly. Which one of the following choices must be true of the for*/s ht c7k;r6q4g f/jtncrbw4-h3u xsce 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 hpx. q4/5 yxm0almdh( time, the mass has po4(/hlxy p0m m h5daxq.sition 2.0 m, velocity 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 obje1k1k,1 lppyqj ct is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during thekkpy,l1p q 1j1 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 sliidyb :e-;v8j)d33:7b- vxt bfsq1gt t )bzktwding 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 0.20. The box is movinge;tgd)3:kwzbs3 71ibt:j-) vfxb bvtt-yd 8q with:

  00.32: A block rests on a flasvfc v2-(j/w xt 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 shown in4jfq5 r8; riatp2ws4u :bd c1t the aw pt;b:qitj84fsru 154dc2 rdiagram 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 hori njgklc(cd 4e 6 zs)lahv6 eqf7-s)6)szontal.vh7ls)zsfds)eanqc6gj ) l(4k ec6- 6 The block remains at rest as 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 res0,pu- gbv+xxgwetb175(s x pf71prvwts on 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 (wher zycr9gu)6, wjtwh- l-e 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 betw) j-9w,hywclr -6utgzeen the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational for);six)*dqkm9i t*q gace of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational fdmxi* )tgq* 9)i qsk;aorce 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 rj+dc e2i70s lx5x u4l l3cgy: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, tjx23 su0cl 5xcirel74: dy lg+he 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 block of mass M=6.0 kg with a constant speed of 5.0 m/o7na1fmj2l1 y s 21nfmyla j71o straight up a flat 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 bloce.:edejbqz q+prk q 4a9 p2-u+k of mass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined that the normal forc qkezd9.q pe4 qr+uea+bp 2:-je 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 represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest efnyu +l9: n2kat 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 t2+luf enk y9n:he magnitude of the normal force from the table on the incline?