07.10: Contact forces are examples of which of the fundamental force9u:-*7i p15ncjfws lbvyct; as?

  99.02: Which of the following terms b+wjd hxpw u8h7-2o4jis NOT related conceptually to the others?

  02.20: The graph shows the relationship o:j+7unqvcsg85 73o g.fz cotpka9 j7between the mass of a number of rubber stoppers a87o 7 no pj3u:7og+tazscq 9.vcgjf5knd their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, w ucq8db7agn+832 ims remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figuim3gau +q 72cw8ds8n bre. 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 serieu6uf6c/b.cvpbxh+jt 1;) pf fs of strc)x6 btf.ch61vjf/ ; ufppbu+ ings 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 uthkky:ie yd 0i (.g;-M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents ty uy(i tg.dek;h0ki :-he tension in the string connecting the masses?

  14.13: Which one of the followi a,ll8g m8 dhsp g,su:fq,,vlzl2p 01nng scientists is most associated with the following statement: “For small displacements of an object from equiliv,uzl,mll,sdn p a2,fq 88s lg0:p1hgbrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted t5:o 0uf8fwq -xn( v9f0bl bxaat an angle of x:b8ba t0 0nf 9ffxvqwo(5-ul$\theta$. 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 rou in.ipug95 ybvr6: v6gw:s7j -e vzc5mgh horizontal floor at constant speed by means of a nzcvibm5-6v7: g9s ujv5 ewgr i.:py6force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the follgttwwmws 3e /69r; r n 0lykqz/.e1kn,owing four ways. In which case is thz3wk tel1sk .wrmq/g/nt;re, yn06 9 we string most likely to break?

  96.39: Assume the objects in the following diagramsl +43z+az yzlyqht3d ( have equal mass and the strings holding them in place are (3q4+ydt zlah l 3zyz+identical. In which case would the string be most likely to break?

  16.10: A person wishes to 18 wkvm5chxj6jn rkt6,v 8/1pvmn wa+accelerate an object upward uniformly. Which one of the following choices must be true pt6 1jjkv8x k5/ 6wnrwhcamvv8 ,nm 1+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-ax3-ib4rpgr 5z gwdmq 9g/ onv88 db.-td3m/zlxis, at one instant of time, the mass ham -t.84rp3zd35n-b xl /bg9gwdzi/o qrv8m g ds position 2.0 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 onn8ycxtw 1y/n7 y3e0sn a rough surface by a horizontal force of 15 N as shown, during the push, the on7yw8n tn1ec y3s/yx0 bject 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 j3:1ihzgq8f2.fjrxr 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 kinetic friction between the box and the floor is f gzh1qjjf :x.2r r83i0.20. The box is moving with:

  00.32: A block rests on a flat plane inclin,gzjgje .bat 2w2e h:/.hr02 dav eec,ed 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 fio21vlt fflf8(rst pulled across a horizontal steel plate as shown in the diagram vf1ltfl(f82o 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 horizonta(c twq,7as6jaih: s(ml. The block remains at rest as θ is slowly increased.( 7hs:i6 ctj(a,sqmaw 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 inclined at53ph0 .o;rxq9kh,m avd nt;j ztq -4af 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 (wherq1;8jj y- gdqye friction is significant) in inclined at the same angle, it willd1jyqg -qj8;y 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 0iu9e-+;)bb6qpq( 9 2 wrhvpnpzddwf 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 the incline’s surface while the x-axis is +)nrq( bpfui2ddh0w;z e9bp6 p9 q-vwparallel to the inclined surface.

  15.13: An object is beingps:)vqf x.i6eynt ),l 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 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 thetepy ) x s:)ivqln.f,6 following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant sfr 3;ul9w /.x gies;whpeed of 5.0 m/s strai f9/hxsirue3ww.l ;; gght 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 on an inclined plane of angle θ 1cuj gk,zpp0dm+o9tt b ;*yk/ . When released, the block does not move. It is determined that the normal force acting from the incline on the block has akopb pj1k *m/0zd9g+u,tt;cy 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 from rest at1f* ns0*s lb3z1c h5vy8u:vm w9jxoky 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 szsy*mlv 01vk1n9:3bw y 5*x8fu hj scolides. During the slide, what is the magnitude of the normal force from the table on the incline?