07.10: Contact forces are examples of which of the fundk8 uw(t 87k.zb k;vbclamental forces?

  99.02: Which of the following terms is NOT relaok.i,9x u vl 9x+7tyhited conceptually to the others?

  02.20: The graph shows the relationship:et;s0ujc6jspyla (;vs7k . p between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the grap0p(6sj:yjas;kve7 ;l uscp. th is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The ma*3 lgy:h;l : jhdakxbt8r/bk+ gnitude of the gravitational force on each block is indicated on the figut;rl a38+xdk:y jhlg :*bkhb/re. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom cei 3uu (e7xyxoy-ling by a series of strings 7uy3yex( uox-as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = xsio5r1js / r:;0r vlv6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the folloor51s :/rjr;isvvx 0l wing choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the followij 9w9afa+5u pno8rwy6ua6rww9oay+ jn8 p5f9ng statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accomb,rx/z o*gk/zw/ .u pdpanying figure, a force F is exerted at an angle of xz *r/gupzkob/wd, /.$\theta$. 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 pulmog: k yze(kd)/b:u-tnqcy .j- pxer:,9+uxpls a wooden box along a rough horizontal floor at constant speed by means ofjpy zb/x+ck-e(dkopmu9y: g -.: )t:nu r,xqe 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. Inilb;b r06 j l r65-iopmj.j* jlhv/oj2 which case is the string most likelyr- rjl;l5io opjj l0jb 6./m2b6*ivj h to break?

  96.39: Assume the objects in the following diagrams have equal mass and the strien2 z+,3cn y .ry8wnlzngs holy,nzr cn +wze3l28y.n ding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward xr(+4;+uxmnby vh8t) yo;zy w uniformly. Which one of the following choices muso;b4+w+r;x(y mzu 8y xh ynv)tt 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 Earth’srotation.

  11.12: A 5.0 kg mass mov . f*gi1:5xnuw7ia-ohry*fer es along the x-axis, at one instant of time, the mass has position 2.0.o 7x1n*i5:r -* e gafhufwiyr 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 object is pushed to the right on a rough surface by a hori6jqq41 +m (n(i4dhxg qw3j9jqfcmn. b zontal force of 15 N as shown, during the push, the object accelerates uniformly to the right at 2.x qj +9iwd1nj.mq 6qm(h(f 3bjnc4g4q5 $m/s^{2}$ . 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 figa *;1zy ;no 8c07zynyuujfjh (ure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficiencau;ho07z81nyz ;(jy*uy jnft of kinetic friction between 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 angle ot1tj *g4izwop1w 0+gzc v hm5/f $30^{\circ}$ 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 arl 5c)3 dlfi 805wrvul horizontal steel plate as shown in the diagram A. wicl3 lul85fd)rr50v
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 theb-rjyt-;5*- y xnrmmeouqfwi(5j5 )xp. v ct. horizontal. The block rema. vjjr) -fi5r cbq5my.puno*5x- tyxt-me(; wins 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 ahjt jcqq32f-/xtg :r:2md9ykt 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 ples( t7c4 ()3ijfeo miaaced 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 fri mitj)ia4es(7 cfo e3(ction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magni353gk vtf8 f8d3v hhwttude 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 t3vdh3t g5h 88 fwtvkf3o the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constane 8:t i7 +qbj,hgah2ont speed on an inclined plane. The free body diobgq:2+ n,ji8 eht7ah agram 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 pushes a block of mass M=6.0 kg with a03g:di hc-b ws constant speed of 5.0 m/s straight up a flat surface incli 0cbdsi :wg3-hned $30^{\circ}$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 blockhbrzmt w nhn:05sq :*evi-8 o, of mass 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 friction between the block and inclined plane is 0.92. Whi: 8q vw5r:mintb0*,nozh h-esch one of the following choices best represents the mass,m, of the block?

  17.40: A small object of ul hk -+;hgv)oy.m ( dga2r7 0b4qutnamass M is released from rest at the top of a frictionless incline. The inclinehas a mass M and mg;vq d27hoy0+)a ha.m -u4r(kutng blakes 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 the incline?