07.10: Contact forces are exadpzdj : rijc5zb ;)-b)mples of which of the fundamental forces?

  99.02: Which of the following terms is NOo ehm y3, m+;rh*1 :wnubr+(*pzz hntzT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of v2pc c/f;+tr(kj 3tjka number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a 2t +;pj fkc 3c(jkrv/trepresentation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. T.k* qtwcbs.g(he magnitude of the gravitational force on each block is indicated.g wtb s.q(c*k 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 classroom ceiling lwz z(pme)*qn;v/ 9f/y:p* mvn6vl mlby a series of stri/9znenwp z /(v;m6flm m yv*v*plql) :ngs as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0pyxgso* 2) 5*fyc cjime6x7m: k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masxs f6 j5cc* yix 7gey)omp*:2mses?

  14.13: Which one of the following scientists is morgdu c 4fp 9wc(+8n2zdst associated with the following statement: “For small displacements of an object from c9(n gzwfd 4rpdu +82cequilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exertps :2+q l,dccxed at an angle of cd:p + ls,qc2x$\theta$. 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)c m 1oyqv w)mb2-*mdqnstant speed by me q)b-2*mvym)w 1 oqdmcans 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. ggdyf0 12f: xxvmvo() In which case is the string most likely to break?(0fgxx o:fg1 )mvvd2 y

  96.39: Assume the objects in the follommfe la/.4hbw 4k 7n6e1eoa8 ;x7zp xbwing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to bre ph; f elb1x.6aew/e 7ob7zxak mm4n84ak?

  16.10: A person wishes to accelerate an object upward uniformly. Which o7 jo4q grxlh)3ne 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 Eartglrqh7o )4 j3xh’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, aa ee406o:sapyii, e1a t one instant of time, the mass has position 2.0 m, vey4aa po1 06ei :iaee,slocity 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 pushedhpo7m;q 7 k9w mu7c;su to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right at 2.mhosum p77cu;k qw79 ;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:ixeqpl a/,*mbrwph h,d9.,z8y q-te-t8pzc 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 kinetic friction bpeq x8tt.l zdbep w-8q, y/m-a*h ,c,rz9hi:petween the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined x(fou3(k2jy l 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 steel plate as shownbn3juz jh27p( in the7(3j2 j hupzbn diagram 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 inc 29uojgq. 8gh rfi/y2xline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictiy jo9 x2fg8hig 2r/.quonal force of the incline on the block

  01.11: A 5 kg block rests on a flat pd qv)i f/we9lq/(5 wejlane 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 ew7 zaj paoy(de3/i10is placed on a second plane (where friction is significant) in inclined at the 1i/(dp0e3woa ae yjz7 same angle, it will begin 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 gravitation2 -s +iro*c fso:dx-0x(xxhy ial force of magnitude 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 incli0oy- sixdixsfrc x(2o-xh + :*ne’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined plane. Thebb *x7m(sf6(1x 3rwrcr xmpk; free body diagram of the object is shown with the gravitationrm(67mscrwp 1brx xfk;b (*x3al 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 constan 28hf4tb:fxih/ 0hbhxt speed of 5.0 m/sxh/ bh hftxi08:f4b2h straight up a flat 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 omovs:fmhwnty+ a. 1-hy3 s5c 4n 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. o:-s+h yhy f15s.4nt ammv3 cw Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is rel ggor /xe2sc*7eased from rest at the top of a frictionless in c /xs7egrg*o2cline. 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 the incline?