07.10: Contact forces are /6fxfxlvr b q +x)u2).6 ge5pcvb lnq-examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the otherts k 2fbd7a1;,cfrs7gs?

  02.20: The graph shows the relationship between the mass of a number of rubber v9xrshnp- y/bzu.q/2w vp(6p stoppers and their resulting weight on some far-off planet. The slozx6/byn pw-p9/2 svhu( vq.rppe of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magnituvuh;u f(*tr9*dql9 hgu0mu r(de of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from block B? *ruh;lg(r(0m9 uuth f 9*q vdu

  14.04: Three equal masses are suspended from a classroom ceiling byd u,jp;fn/gb e6nah/ yy b p)7)wv85py a series of strings as shown in the figure. Which y)nppfb v7; b8),p hj5egawyynd// u 6string has the greatest tension?

  16.05: In the figureez2 8c i,0wlws shown, 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 following choices represents the tension in the string connecting th0,sw8w 2 ziclee masses?

  14.13: Which one of the following scientists is most associat0+k i-omlfx (ced with the following sc ki0omlf+(- xtatement: “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 accoe n2/dtwnt:z )0 mgdu7 b7ss:empanying figure, a force F is exerted at an angle of mdnw:) sdu20tnee7g s / tb:7z$\theta$. 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 co h3x/t8d c:gbcuop+m/ nstant speed byt+d8b upg://3mhcc xo means of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can ycd-4f : (fpvvhji(6)k:jk gk 6+adhxbe hung in any of the following four ways. In which case is the string most likely tjfd ki(-v g 6d6h(:j:yaf)p cxkk+v4ho break?

  96.39: Assume the objects in the following diagrams have equal mass and the strzru3(nn n 3+f g-g2rssings holding them in place are identicass32rf-+ zn(3gn gur nl. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which s6)z6 xbnrxigk(x5,zpu4b08cn o4dvqw y2 t*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 t4xni k,cybodqp (w)*zxz v t4066x5 gub2nrs8he air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves alon+3:re x*8 ekepzj9dlkv( xhc2g the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelere:rk3vzjdhe +lp9x ckxe2(8 *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 horgllz .7)mm, kcg0w 9i*o fw4ztizontal force of 15 N as shown, during the push, the object accelerates uniformgmli.0*z4 k )g7zl wocf9twm, ly 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 shownolx c*ew2ywjy, .3 7kf in the figure 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 coefficient of kinetw3 c oj,yw2.lfy7e*xk ic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat hn*n:2nl- .nfalz8e i-n yuw0plane 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 horrvxeh+amqz *iu,u-n ng75l-:mp6 -zhizontal steel plate as shown in the diavg7uh-lamz -u6p:-iemnn,x5qr z *+hgram 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 tthh*;to gq8d u.((frx he angle θ with the horizontal. The bl8d t*.rx;ft( o(hghq uock 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 v,bb cyz-w8go:x:d5lrests 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 (where friction is significqn0/.6-f hnubsm o yl8ant) in inclined at the same angle, it will beh0nlf 6u-oq8ynm/ b.sgin to accelerate 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 magn2hn+ (:e+tdr+m )uwcom,qjsy itude 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 to the incline’s surface while the x-axis is pary+u +ho:2cerq(tmm+ jd), nsw allel to the inclined surface.

  15.13: An object is being pushed at constant speed t ;wk8l(viaoip: 9id; on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the fr t;iadikpv ( i89;ol:wiction 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 s feao:pjq y8mk,/2 ;rof mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surfa2, fq 8kpsy ;oejmr:a/ce 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 inclinw)1.*sechjf t 3leom0r,pzzlrw ( v6)ed 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. rwl(j fvm 1)s). ,l* r0ohz wp36cztee 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 res siwis )),avbmo +epn)t 7.vh5t at the top of a frictionless incline. The inclinehas a mass +)bo ,5v).sviwhstnpe)i7 amM 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 the incline?