07.10: Contact forces a9; t+qej1njqzre examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to th v 4v20 nxcvg8os0hx*zcpcn:)e others?

  02.20: The graph shows the relationship between the mass of a number8v-d0esakw;8ve* w st of rubber stw e vw0sek8;td*v8as-oppers and their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,/ j ;8 xbea.z.cga77 uhzqyu,kB, 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 con y ;hacuzq7e7kag .x.b/ uz8,jtact force on block C from block B?

  14.04: Three equal massej.ob.pi-o+2 al aynb5 s are suspended from a classroom ceiling by a series of strings as shown in the figure. Which stri.ijnabbo2 a+o-l5y .p ng has the greatest tension?

  16.05: In the figure :j01pm0)ccyx5u tsw ns- +zoe 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 chn-+5 0t c s1mjupscy0):z woxeoices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the followic3-r rp3o .sfi,wv xy1ng statement: “For small displacements of an object from equilibrium, there is a restoring force3-rpsri 3w o .1cyvx,f that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a s ,t 8 / vshla3zezxm)sft+u/)force F is exerted at an angle of tlu /+hsx v)asm8s/z 3,t zef)$\theta$. 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 rom4cv/0oz1,o650 voauvp vyv u ugh horizontal floor at constant speed by means of a force P as shown to the right. Which of the fv0vpa y,/ oo60 vvu1o 4cuvm5zollowing must be true?

  99.08: A weight can be hung in any of the following four ways. In which case 6) trid ,e:des,ajins(7df3d is the string mosd3 i6 ds,7stf )(,d:ednjerai t likely to break?

  96.39: Assume the objects in the following diagrams have equal ma13lzb xt:p,h- me4ibzss and the strings holding them in place are identical.b h,3zzx:il- 1btem p4 In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifoq899ne bt naz k++6lwermly. Which one of the following choices must be twe +z9en98l6qa+ t nkbrue 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 moves along the x-axis, at one instant of time, the masscb4d8 pm 7qi.r4t/ rmb c48ice+l 3** zjjkkvv has position 2.0ld8+tb/vm c*i4*ebp.kckcqv ji 44r 7r3mj z8 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 anv131oymjfjqwv;(+ xi(q h,g6 m1ql v horizontal force of 15 N as shown, during the push, the obj i(h gnvj3 1qf+q6y;ljmx,v vwm1(1qoect accelerates uniformly 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 right sgiu90m4 4cpc 49trfz 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 between the box and the fl4 cgcm0pi4 9 49rzstufoor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined 2pojva. 4zb e3zaeta9;z/wj5at 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 stelg /qds6m44i9i -dhzzel plate as shown in the di-h 4dizsqglz96m4i /dagram 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 anglws5csiv;j:8bu* *yk c /ytb/ s y.iz9re θ with the horizontal. The block;su r/yt j*w59bvy*ysicz.sc b8i :/k 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 flat plane inc: yl 0lyx/s k)zp7ch)9xl -bkp a*mvn0lined 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 significant)hvzf i1-.lfnvvs )gnz (wvmc*17 n0t, in inclined at the 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 1l0v(i1nzv-f 7*vnn. w zgvt m,)fhsc plane?

  08.08: An object on an inclined plane has a gravitatiodygph 25 3sx*onal force of magnitude N 10 acting on it from the Earth. Which of the following yd23h5os p*gxgives 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 pushed at constant speed c 3gdva6-tkf.j9h-5sc s pc*z j/gl l-on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, pgk .ctgd s*3fl ljj6z- -cs9/-hva5cthe 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=61i6* d 2wrlltsf,-wgt.0 kg with a constant speed of 5.0 m/s straight up a flat surfac 6g*ttw12fw-ld is, rle 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 o, z ejbhjf,o b1mpc/jpm3 4ql; (vm.)my+8hbtf 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 magni m.)mqmoyetv 1b8p/ ,+cb f(; l3jzj, h4hpjmbtude 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 from rest at the t nih7 iaxgr (9-jjeo3)op of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The-ari 73j(x hj)ogien9 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?