07.10: Contact forces are exta;t*sxk)ypz78nxxh e , mycx w5*) m9amples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the otha uu */uz)hi1kers?

  02.20: The graph sho z glity3x4-6y4vk yw7ws the relationship between the mass of a number of rubber stoppers and their resulting weight on some far-off 3-y74t6vy 4il wxk gzyplanet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table.c;vw 9ony/ndtk()b.;uvsp5m The magnitude of ow;n(c 9 stp).m;vb uvy 5knd/the gravitational force 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 suspcbusd 7ergh**,,bwz g 6o)p8l mr/c -wended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tension? rd s8 wb6,ecg)lm,rhboc/u7 w*zp-g *

  16.05: In the figure shown, the mass m = 6.0 k。and the mass +y -6qyzz3g g,uj2yg lM = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the stg6lj q 2gzy3+g-zyy, uring connecting the masses?

  14.13: Which one of the following scientists is most associated with the9evgq amb8ri-+bw5 3o following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to +8b5w3 - 9eaqgvb roimthe displacement.”?

  94.26: As shown in the accompanying figure, a force v-pih/a 1pe7z F is exerted at an angle of -1 e7vppzih/ a$\theta$. 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 alorge-ygo ux e/,c jk1m( vn+i/;m 4rk+xng a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be4re, g1yk+ o/vkcr m;+xnj(e gxmu/-i true?

  99.08: A weight can be hung in any of the following four ways. p i+ ux;s,elsgi,//xc In which case is the string most likely to br/,s;uc/ixx e, isp+ lgeak?

  96.39: Assume the objects in )vk bhv6a 8k-nbl(x3r the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be mos(x a-v)nb k6k 8lbhvr3t likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which o6bqc7 * sjtv,hne of the following choices must be true of the force F, provided by the person onto the object? W represents the magnitudjt hcq*7vsb,6e 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 movve ;rcc,z*;(.p(0uh kvwar7wpuv t 7bes along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleratv(p;7w apcr.*e w7ur;v ( h,ukb0 vtzcion $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushed s.6dgoebpsav:6(yk n( b9rp:z x g 28nto the right on a rough surface by a horizontal force k2xs(v yap98ndznger(g:pb6b .6 :so of 15 N as shown, during the push, 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 the figure t-icqcp10o5ftfmv h1dz,g ,q/:qj y e-o*.znbo the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to -ohq 0z *yce:cnp,j .gq-o1v/ 5tfd1 ,bfqzmi 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 a ep90 )lbp.i6oh/qmsfngle 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 stekwn tle8;7v9 vel plate as shown in the diagv9 vle;78k nwtram 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 h x:v5af zt k2p/( jgecr1c5hd3q2*lh angle θ with the horizontal. The block remains at rest as θ is slowly increased. The hjcq:2ga /k 53h( tfh2*1vplrxze d5cmagnitudes 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 at an angle:r;.,nsf .l njotuu/ 44 /afslo ov4ki 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 signifiubx (565 bzcs4 npljj/cant) 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 thel bpjz/6x5bn5(j4uc s second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitude N fw1j6e8v r)ym10 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 incliny)j8 r6f1vew me’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at co5-hzoi8jj t:jt 2 na:wiffop.5qg92m nstant 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 correct relationships between zjn5i-8ohji9w. 2q fj g5t ::mtpaf 2o

  08.20: A person pushes a block of mass M=6.0 kg with a constant g72fncx a94,d :qr4ul/begqf speed of 5.0 m/s straight up a flat sxu7d4c/n qrl,4gf29eg qa f:burface 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 ooby0cgx cr,0v5x m t7,f 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 magnitude of 62 N while the force of static friction acting on the block has a magnitude of 38 N. The coef ,7 c5, mgcy0ov0tbxrxficient 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 top of v 6ugw6pm/2kt/ -ntu3ivk 7b6sppb 3 xa frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. 66ks/ut/3 kpvx 2-gb wb7upni tvm3p6The 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?