07.10: Contact forces are examples of which of the funr4un 6+nymx*gj 4c fn+damental forces?

  99.02: Which of the following terms is NOT related rez6 :n( s8gubconceptually to the others?

  02.20: The graph shows the relationship between the mass of a number o+ v9, v.jgdyzo +ymy;fub j,n/f rubber stoppers and their resulting weight on some far-off planet. The slope of the grazdy b g ,+;vu9,.yyj+ vnojf/mph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain as4fy e1vknl fw:q2r4n( 2ucox,b 0(km t 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 from blockroqf14,s 4b xu ewc (lkf2yn2( vnmk:0 B?

  14.04: Three equal massehgezltea+51 / oll9zk 9. fws1s are suspended from a classroom ceiling by a series of strings as shown in the figul1k.t+l5zagze f1s elh/w 99ore. Which string has the greatest tension?

  16.05: In the figure shown, th6y7rukw4xlhuc ;;nr;f8m n) k e mass m = 6.0 k。and the mass M = 14.0 k。are stationan m8nw ;hy64 rurfulck;;7x)kry. The mass 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 ass)ij bksq- 3 h/(,jw7znm 9rg1 rtqjht(ociated with the following statement: “For small displacements of an object from equilibrium, thereq rthj(j1/iznk -m7s (3rhq)9wgjbt, is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figur8nxf 1ycquc* 2e, a force F is exerted at an angle of *uncyx1f q82c$\theta$. 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 horier1 5o jmf sz6ls87gm *tuqlqe rzj-,f.27 co/zontal floor at constant speed by means of a force P as shown to the right. Wl2 sz rgqjjo*8us7 rf 7e6z/om c5tql.,-em1fhich of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which casep9+- vcvkp3cc is the string most likely to brekpvv- c9cp+ 3cak?

  96.39: Assume the objects in the follo,q.6ckb3 j0lcx vpq,x8 j,tp)ah*3fmth f;zr wing diagrams have equal mass and the strings holding them in place are identicaqz8 tpp)*,r qv,hcm6 tjjkb x;,lf3.xcah 0f3l. In which case would the string be most likely to break?

  16.10: A person wishea17kbo rs4; sss to accelerate 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 represents the magnitude of the gravitational force acting on the object. Ignore any effects of the air or of the Earthr;kssas4o b 71’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, a5at rbtii948ylmw z:20tuiff o vqgq*w6b );.t one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleration 5.)otb2ibuft 9ifa ryz 4mtvlq:w6iw q8g0;* $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushev; cau d8iu6.lheo4u0(iua 2id to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the objedu(i8 ; c20uva.o6u 4l eiihuact 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 show 35wew9j4 dtpn ktg +4xy )x x4gd3ngu;n.uho(n in the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being ate34nxdkg4wgu ) dgph5.4unxy;t3 (9jwn o +xpplied 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 fl)nfdb9g(/ig 0 z gw8xsr gd/j1cy0r8lat 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 firsxrt/z x/:at(b 4 a vogj)j7sr5t pulled across a horizontal steel plate as shown in the diagra74/(xrj bovr) z5s t/jagatx:m 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 withg(+5x * cuzvpk5d.gi q the horizontal. The block remains at rest as θ is slowly increaspv(kxgug* q+ 55diz.c ed. 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 inclinedz3s4ol1m zv 5(rw )koe*r:.c yclx5*gm5z nqq 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 sa :+5zapq t*fk;;69nr* mfwmr 5fhddxignificant) in inclined at the same angle, it will begin to accelz *f:kf5x9nd d afr;6rm5*awtm+ ;hq perate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitude N pwupaunx3r 3kna0*.lwm( 5)b 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 the x-ax 3bxrnnual(a* 3k pp.u)0w5mw is is parallel to the inclined surface.

  15.13: An object is being pushedjski zexpsq7h ag/*2)1+ 30mqsc y sw6 at constant speed on an inclined plane. The free body +7 hjkpc)3wmg0sqix6sqz/ses2*y a1 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 following choices represents correct relationships between

  08.20: A person pushagov 5tw43mv4es a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface incliv4vtgw53mao 4 ned $30^{\circ}$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 plane ovrou(p4 qjn04cf;aygw2 ,b 9m)0nnoi f 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 icqv(wbrgy)o 4a9mpjn;ni04o 2n f0u ,s 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 at t6 )vs/. fsjehihe top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a ej)f.ssvh 6/ itable as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?