07.10: Contact forces are examplesr3: k h4r7o;8ls(kxxaqx+ kbw of which of the fundamental forces?

  99.02: Which of the following 9xg-v kki)fq+terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubberz;.necnd1u3c2vqi fe1uah. 5 stoppers and their resulting weight on some far-off planet. The slope of the gc 1e5n.udvq z. hiun13fa2;ceraph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on rrbs +6x r6f-pa table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from bl x-rrf+p6s6r bock B?

  14.04: Three equal masses are suspended from a classroom ce)nk7q:p kzwqtjcf9h) , (zq/ kiling by a series of strings as shoz, 9qzqp7ck(t)): wjkkn/fhq wn 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 = xyybvqz+;3g(nts 4adsl 98. oflu5 x;14.0 k。are stati;sl lx.yfs3xa5 y+ d vzun8bt4(g 9qo;onary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scien aaa .s6s.eu ffic:xq97cw/d;.tn 4ln tists is most associated with the following statement: “For small displacem 6fs na .axc.eq49 ctnfu w/.7si:;ladents of an 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 an2,(l:w5hyas x2lebh k angle of :b2 sexh,lylk( a5wh 2$\theta$. 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 hoy,3a ob:l7 tqtrizontal floor at constant speed by means of a force P as shown to the right. Which of the folta,tlqyb:7o3 lowing must be true?

  99.08: A weight can be hung in any of th :i7kcan+ v:ame following four ways. In which case is the string most likelyc :kimv na:+7a to break?

  96.39: Assume the objects1j3b-h9x chszyqw6cpz7s6qstk1:x 3 in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break3k1qxxh1s w6zsh 3-c9:qjpcyb6z7t s?

  16.10: A person wishes to accelerate an ozdvy ( 7ydp9ir :vnh85bject upward 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 on7dy:pv5dznh9 r i(y8v the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves ac .wa+ik ;hz- gfs1k:nlong the x-axis, at one instant of time, the mass has position w1knafsck;g+.z i :h- 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 righnsj ozg av-:ln8xm,(x4o ug2:edh-s 4t on a rough surface by a horizontal force of 15 N as shown, during the push, the object asnaovm s-,24hdu:-(4 8:njexoxg g lz ccelerates 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 9p,4cl ngf e,fsp-3ucin the figure to the right is sliding to the right along the floor. A horizontal force of 10.s4-, fn,pf9lp cucg 3e0 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 ino-lafb9lbu -lq9*e:6 ao7y rn clined 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 horiz4 ;cckm9ia eb ,2s3xsvontal steel plate as shown in tm ss ,32;i axbv9kc4eche 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 angle θ with tz/ )eahhnqf 2*he horizontal. The block remains at rest as θ is slowly increanqa )*2f/ehzh sed. 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 incl3jy 0tggit845y1g.aqo p g:kc ined 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 g1;bi7.5 subjglc+0 ld. ryzy is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between tg0lrl 7gy1zji.;5+udbsc .ybhe block and the second inclined plane?

  08.08: An object on an incli/69. ru2voifqqs 0w*-tmhbh qned plane has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following givf2iqhb. qvsu to*qr w96m 0h-/es 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 beb bj)4yrf1o)f v*v3w bing 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 the following choices represents cofo)4*vvybrjb3w b f1) rrect relationships between

  08.20: A person pushes a block of mass M4r8zzlnjhp.x+e7;m hh5m5 uotb+f j 4=6.0 kg with a constant speed of 5.0 m/s straight up a flatz+j4 8x47; r5me zjo.bh+m5h pnfhtlu 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 m,o.cy:vh,9ez bzl-(laxpgi + isplaced on an inclined plane of angle θ . When released, the block does not move. It is determined that the ,lz:a+io x (le9.b-zyc ghpv,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 best represents the mass,m, of the block?

  17.40: A small object of mass M i 7;aleg 1z5uoks released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the houa5 1z;gol7ke rizontal. 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?