07.10: Contact forces are examples of which of w2,et412t2a/t qo8sk ifi auuthe fundamental forces?

  99.02: Which of the following terms is NOT related conceptually uyn6r 721ka,vr3nw2lq (x7dek4 vuvn to the others?

  02.20: The graph shows the relationship betw.n vdi,cvk(;tnphx(. vp8( mop rh77teen the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation o tvtoxmp,p7p(.;v7.nh ckn r8d(h(ivf the:

  10.15: Three blocks, labeled A,B, 0tc p(9q uwg-4xi/ vn/yx2m*nh6nlwcex ks -+ and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contac /y xnx6 ni m*ptkhve-/cwq9 c42(un-gsw 0lx+t force on block C from block B?

  14.04: Three equal masses are suspended from1psmpk i5vdu +;oxx4;68qci lhz-s4l a classroom ceiling by a series of strings as shown in the figure. sklc1hdx8 pi;s xl;-6oi z m4u45+pqvWhich string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 -dttm4bvd8 ( tk。are stationary. The mass M rests on the floor. Which one of the following choices represet4tvt-8m( d bdnts the tension in the string connecting the masses?

  14.13: Which one of the following sci/*qltq 5s8h1hjk rk:1opx gn(entists is most associated with the following statement: “For small di xrqno(h5q1 lp1:s/ *8kgjkhtsplacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figurr o ikg,d mv/5v+8u75t hniy0he, a force F is exerted at an angle of h7,5gd v o 0u8ykr5i vh/itnm+$\theta$. 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 flombr9h 2:ux vg)or at constant speed by means of a force P as shown to the right. Which of th2m:x brgvh )u9e following must be true?

  99.08: A weight can be hung in any of the folmfgc yh:js//e0l1 1lr3 2 ykfclowing four ways. In which case is thhemy lyj:s rk/2/1c3f0lgfc1 e string most likely to break?

  96.39: Assume the objects in the following diagrams have equal m zt7;h5xaxq,o ri /j3eass and the strings holding them in place are identical. Ir/5 tqha3e,zox7 x j;in which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one of t1ryk.elur2u /ve q0-5btn t-w o9 qkrpj53 h-ihe 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 Earth’srotjpr.u0t-/-q5yr2ienqw ek-brk 95 v 3ul1tohation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time,,r m1g,1kzkciqx+ 4hw the mass has position 2.0 m, velocity 3.0 m/s,an4rcwg mi1 , x+,kqhk1zd 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 sdj : vrf-fm0t:rhrzintyr+ 2/m )u. 7murface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to thtur:/n7 2t:d)m mj.iv0rf+-f r rmzyhe 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 b6 v18m,.lkyhz(jmxsrj) in / sox shown in the figure to the right is sliding to the right alrj 6 ykss1i./)n ,m(vxljzm8 hong the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient 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 anglymb 0w hwj(t+ t-oo)q8e 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 i:- gi2z8juqnus first pulled across a horizontal steel plate as shown in :in8- uquzgj 2the 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 incline that makes the ang 8kdf8knu ko4bmv4-xgi3 f23 rle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on gu3x84vk4frkmob82n3 dfk-ithe block

  01.11: A 5 kg block rests on a flat plane inclined v9-hwu .wku7yat 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 si d),* g1w0gdzn pke4xugnificant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frictione,udk)g1* dpzxg 4 w0n between the block and the second inclined plane?

  08.08: An object on an inclined plane eh(qfom syp.h 30b7;lrx8t j0has a gravitational 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 therlxp0 he3(fth0; q 8o.smy7jb incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is byd ns, mh8x-a1eing pushed at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction foyx,a-h s8m1dnrce 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 me+6goes8o*m evs osu-t s) .9a constant speed of 5.0 m/s straight up a flat surface inclined o so8t ss+ )m*emgu9.6e-oesv$30^{\circ}$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 plaj79n)4iphvszn:c g d.4kp dc 6c9rbn ;ne of angle θ . When released, the block does not move. It is determined that the normal forcpc z r 44pndsgc:9icbh9k7d6;)n j.nve 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 block?

  17.40: A small object of mass M is released be:e 8)t;vj2 qvwxg,buog 2duv69ray x d-;z 7from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizonvwxba de ; ,78t;2d oq9vz-j)6ex2g: vb uyurgtal. 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?