07.10: Contact forces are examples of which of the fundamen 1 9be: ipul-inwstb(ac/3z(pbt; e p1tal forces?

  99.02: Which of the following terms k- jk*w6 oy,cvis NOT related conceptually to the others?

  02.20: The graph showq:xydf4k)r9au6 c5vf s the relationship between 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 of the: qx:y5f6kad4fc u9 )rv

  10.15: Three blocks, g9a 9 dhc ksdl 1wep/*je4kv3h53- cfclabeled A,B, and C, remain at rest on a table. The magnitude of the gravitational forceef/jgs9c cwdav1*pd3kc-3 94klh5 he on each block is indicated 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 by a sa(x9cj 4xjoi9eries of strings as shown in thecxjoaij( 4x9 9 figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 op(fo5f j 9obp*k;8o-sldhr .k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tenjop8k.b9 lr*ofo -;hfp sd 5(osion in the string connecting the masses?

  14.13: Which one of the following scientists is most assoksq f/2 w aj4ssv2rd54ciated with the following statement: “For small displacements of ad r2s jskfwsa4 q24v/5n object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle o5fxd- 5 p3yxgc6etz*wf gt*3ye 5zd56 x fxwp-c$\theta$. 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 cofb n60vjs8 2box along a rough horizontal floor at constant spee02fs oc6 nvjb8d by means of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any8jz (7p fndra7 of the following four ways. In which case is the string mos(arpj7n fd 7z8t likely to break?

  96.39: Assume the objects in the following diagrams have equmgp.5t2 3 dlesal mass and the strings holding them in place are identical. In which case would the s5 edplt3 2mg.string be most likely to break?

  16.10: A person wishes to accelerate an object upwa b7m+w.a zk-zyrd uniformly. Which 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 the air or of the E.z+ybkw7m az -arth’srotation.

  11.12: A 5.0 kg mass movg )i2 sg7twt.e n(ch*5tpy7rd xnm b,/es along the x-axis, at one instant of time, the mass has position 2.0 m, velti.r 7hd/snpe*)gm w yx25,nc7t bgt(ocity 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 jk,*fpc/jc. nl 5qp o)horizontal force of 15 N as shown, during the push)l,f/ kpj5nc j p*cq.o, the object 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 th*inr3s)1o wgr((yll0 b7h jzue 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 between the box and the floor is 0.20. The box is moving with:o7*ln hr(j0sg )y3lb uiwr1z(

  00.32: A block rests on a flat pla23/pqm -2ff7 yv(n(krs ukxe cne 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 horirm2p-s7,r 1k pjhkpdek-t 5z- zontal steel plate as shown in the diag ksm ,k pzrj5pkh--7t1dr-2epram 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 angle θ with the horizo: *fq,-6bz h7cceh owpntal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the inclinw6ehcph:7 -,fo c*b qze on the block

  01.11: A 5 kg block rests on a i(1*0kaornb.ytogis8 d7atqkebv)p i 3 71 n7flat 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 significant)wsbktu4p/6q/; fwhcsg9mm /m7 hqh; 1y j /sq9 in inclined at the same angle, it will begin to accelerate at 2.0 m/s. Whb/ wm/6tjhwycp q97 gh94 kums /;f/hsm qq;s1at 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 magnitude N bm)xjn* 1lfbt yvs2 w*i5nl, )mvj+.evyn :7q 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordinat)mf* nnm51n*jbj t v,vl.xqwy 7ise:bvy2l+) e 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 p*g jm-xpvhdqo4jo; ) (ushed 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 o;v)hm dp-x q(*4og jjforce 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 constant speed of9 ygl5w ln)b9c 5.0 m/s straight up a flat surface lwn59glby c)9 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 inclined plan,3svvtxq z0 3xe 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. Which one of the following choices st3xv z03,q xvbest represents the mass,m, of the block?

  17.40: A small object of mass .3wbz2zsa p . -ykf:hg 7(q;t2qqpr dxM is released from rest at the top of a frictionless incline. 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 inclin7hy zq.rxf s p k22wgbadz3 .;q-(:qtpe?