07.10: Contact forces are examples of which of the fundamental, k.p3 /35exo - )eoaah+ljljenamf)q forces?

  99.02: Which of the following terms is NOTs: lh+oriwo ft, km ,))ucnw6( related conceptually to the others?

  02.20: The graph showf:x x0h y:z 8sv:do3lhs the relationship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representatiol h0:yzovf3d8 shxx: :n of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The mk( jr r88p,yubagnitude of the gravitational force on each block is indicated on the figure. Wr8 b,kpuryj8(hat is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended froecz k4 xklmqz/ -,1;+ wo tl6lv4iet:ym a classroom ceiling by a series of strings as shown wm;yi lxve 14zlkzt cl-q +/:tko ,4e6in the figure. Which string has the greatest tension?

  16.05: In the figure r0s*j.)-ee ga n06 1fudhz rboshown, the mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the follow u e)1ds0ohngarezf0-jr.b 6*ing choices represents the tension in the string connecting the masses?

  14.13: Which one of the following srijk 9dx y:(3acientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restorin:3ai(r x d9jykg force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted smdy77aev; l ukxt ;3*at an angle of k *7amvxut l3;e; yd7s$\theta$. 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 rougw5q:z*--dakrpl x )mgh horizontal floor at constant speed by means of a force P as shown to the right. Which of the fkzm--dwgxqa:* 5 prl) ollowing must be true?

  99.08: A weight can be hung in any of the a mrr7ckdntol.v c/)-)c6irhm k(85o following four ways. In which case is the string mostmrid6mr5)(8.klhcn r )a c ktov-7oc/ likely to break?

  96.39: Assume the objects i;ugh/g4oduk;0 nk0wo n the following diagrams have equal mass and the strings d gk/onk;0u4;u0o gwhholding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an op 5ipqm87v.fik;n yu(bject 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 magnitudvkn8pm;y q(fi.7ip5 ue 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-axispm 2w j qt*rc-5a;jlb5, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelermtc* j5alqp2 jw5-b r;ation $4.0\;m/s^{2}$ . 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 horx17eve )ag7kzizontal 71xa zee7vk g) force of 15 N as shown, 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 +ucuza xny)x9 .g 3 i9pjfie./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 betwx39+iyjn9p z.ug)e/ ia.u c xfeen 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 anglvc:po ur8 t*o+8nwcrqnvwp8t )(k q- :e 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 pu3dkl vlpmzp4;;:ad4 k lled across a horizontal steel plate as shown in the diagram3 k;d4pd lml:kp;z va4 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 ovyr;h-(yn /d θ with the horizontal. The block dr -;y/(vhnyo 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 rests on a flat plane inclined at an angle ofbo0d;zxv4s9xnsx;7n bk2 y 7w $30^{\circ}$ 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 oz5mp80eb oy*(6a xsqfriction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What za5o *b8ype0 m(6sq oxis 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: r 2 3 trg.c2)unt5)ebo,f8y zqlkctv magnitude N 10 acting on it from the Earth. Which of the following gives the correct componftb.e rvcgz8tq ): ktnoy53,r2l )c2u ents 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 ac9oi y 8le4t.h2drpj+ t constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force rep .9diyr 24pe +c8htjloresented 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 pushes a block of mass M=6.0 kg with a constan7tieyqb0-( w)ur uk; dt speed of 5.0 m/s straight up a qb y-)rd(e0u u;t7ikwflat 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 mass misplaced on an inclined plane of afy dsq*jbh6 pd 2nbadt..31*gngle 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 stati qta2.gns.hp1bb * 63jfyd d*dc 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 at the topdks8g b z;i,(mcq w3qu3-ny 5b of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at re-q bi3ydgqm,w8;(nk 5zbu3csston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?