07.10: Contact forces are examples of which of the fundam2kqed4.d00b+;jm ykr segr7uental forces?

  99.02: Which of the followihsj3)k;twia)o ek3 7mng terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubberss tcmp-wzo8 8*o,y5 7gs -sut stoppers and their resulting ps5stg z tc 88*- 7,moswyou-sweight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest*e *dymvl ctj. 2evc678lg5ds on a table. The magnitude of the gravitationgjem2s*c8 l 5 del7tv cdv6.*yal 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 masses are suspended from a classroock59pc(-vo y hcio15 qm ceiling by a series of strings asp9y 5v1 c5ick(-qohoc shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the m9oa 1xc3w gnnu3 j/8 swkj.+ovass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the t1w 8a3 cx+ 3nu/v.sjkgow9onjension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the fq 0x)n5djo3 .fb,mymx ollowing statement: “For small displacements of an object from equ)0 d.y5mj qn,xmoxfb3ilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle /w +8nbi7 bemdj ;r;f -uybs9 dc*o8pxof u8fwbcys+m7b;*b xj98oid- ;/e pndr$\theta$. 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 horizontal floor at cohln8 (a wh:dto-hk5 4hfnc/b9 nstant speed by meanshohhda(f/ 4c85t nh9-k wbln: of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In whvicm fzlo/scy21b246dswj 7( ich case is t7w cv12 6 olm(sdybi2/z4cjf she string most likely to break?

  96.39: Assume the objects in the following diagrams u bhk55(5b0jdj sulg/have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break? sb 5gudjb( 5j0ku l5h/

  16.10: A person wishes to accelerate an object upwardg:;if6nmbhm9t qg9lox pa fi6*o,v 5; uniformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W represents the mi;*alvm pmf 59:tooqg69hfn, 6b gx;iagnitude 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+yny7wc6- do-g8 d edo, the mass has position 2.0 m, velocite yo- 6+ dwgyc-d7ond8y 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 objab25+kdw bt5q ect is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates u a25+wd5btkqbniformly 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 rii m2in sl/ks8 5sd0gz0ght is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic fric s0si li05ms8gz/d2nktion between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a fli ln3g;og z79,5zlld sat 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 stesejka4 gm()8ur r +mo,el plate as shown in the diagra,)ou e4mm a +8(rkjgsrm 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 ma /grwx1jev xw ,or-on-nt85jw+ w5ho-1-t rogkes the angle θ with the horizontal. The -ew w/+h1-vo8nx-w5woo r o15x,g tjrn g- rtjblock 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 e6h*md6.sq +tdkgb-k1x) qzl 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 plgg48 (gjqa 8:ifvurd qle 1/k)aced on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. Whk qj)gu g14di vq/(r:lgea8 f8at is the force of friction between the block and the second inclined plane?

  08.08: An object on an 4 ,0 vdfktuy;sg-wq+einclined plane has a gravitational force of magnitude N 10 acting on dwvy u4qk0;-s+te,f git 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-axis is parallel to the inclined surface.

  15.13: An object is being pushedv7o v)0u xpsfjx5s1.v at constant speed on an inclined plane. The free body diagram of the object i)0vf1jp vx 5ux7vs. oss 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 pushes a block of mass M=6.0 kg with a constant speed of 5.0 m/spl2o 64dmqu kmy.0/ic straight up a flat surface inclinedi/lm 0yqu odkmc p6.24 $30^{\circ}$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 angle θ . Wheuis2nqd4 w)+ kn 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 choices best represents the mass,m, of the b i4+ds uqk)w2nlock?

  17.40: A small object of mass M is released from rest at the top of a frictfpj.rv9 2hz5pionless 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 magnitude of the normal force from the table on h52p v zfj.p9rthe incline?