07.10: Contact forces are examples of which of the fundas1xu24 2 cumlmmental forces?

  99.02: Which of the f7gk p1/bd8ag yollowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number o7ockj04s5d2llb 2j5vhqogh 9 f rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of th covh kl5qloh0952gsjbjd742e:

  10.15: Three blocks, labeled A,B, and C, remain at rey p)oxeg1f1 yi( r1xe;st on a 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 ;yye1r ex1 i1o g()xfpfrom block B?

  14.04: Three equal masses are suspendeb:k dw 1sxhmylya c 7xx ;2shv68eq)))n (-pccd from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tensi1 h-h) ycyk7cc 2;8 :banms)x) pwxe xqs(dvl6on?

  16.05: In the figure shown, tzjr vr1vw2,q e)l2jrm2/m fh+he mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor.relm1 /rq mvzhjw2jfv+),2r2 Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of fzu 54fb2cpseg3(i- jthe following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the dispg 5fiecb s -j4fz(2u3placement.”?

  94.26: As shown in the accompanying figure, a force F is exert9b gv(xnv*;cc ed at an angle of xgnb; c *9vvc($\theta$. 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 ,r/mu 0) dxlboalong a rough horizontal floor at constant speed by meab)x duol/r0m,ns of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In whi-.x2 . nd+ na88uk ;avdyhdcjhch case is the string most likely to breakc-k.d8vd.u axd8 n; nhyaj +2h?

  96.39: Assume the objects in the following diagrams have equal mass and the str p0.n:g-9nv qvrkzc, yings holding v.nqr 0gk,c:9vz p-ynthem in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whickn-.o0, mgj2qqgrr m +h 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 Earth’sro+.- m omkr,gqn0 jqr2gtation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of tim,u01h,cnvhzf jx(d: pe, the mass has position 2.0 m, velocity n:1h,z f jp,du(h0v xc3.0 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 2quhm/zzllp e5 )/ gh.a horizontal force of 15 N as shown, during the push, the object acceleratesgu/ l/phzehz2)q. 5ml 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 thr f-g44nigu;r+h vtc3e figure to the right is sliding to the right ali4r g cnrgt-f uv34;+hong 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:

  00.32: A block restss)98 knt5ppil gs w)t/ on a flat plane 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 fi7x;iglfwotzn9 7 : l3zrst pulled across a horizontal steel plate as shown in the diagrami:;9n3z77 zof tgll wx 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 ml 7;(iz -aop)oztfv;kakes the angle θ with the horizontal. The block remains at rest 7oiz;pl ft)az(vk-;o 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 inclined at anfv pta21np4f5 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 ob1n5 m335+r knaiupc.h0 (y fd jzbj-bn a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerat ru0hipzk5 n1b.fm nj5(+3cb3bj yda-e 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 incld:+e xw81+: t4b0fckwomq tme ib/ mx1ined plane has a 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 parallel to the inclxm01:m1kd:+ em8 c+bto/ti w xq befw4ined surface.

  15.13: An object is being pushed o8zn+wm5ppo ujr wdd2q1jf7av*6uplc ; -9 + iat constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the frictijipr o87m vul2 c-dz16dwaj9opnu w p5q+*+f ;on 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=6.0 kg with a constant speed of 5.0 m/jvi,p/b4bkxx3net2 hfj do np9*9)0 ws straight up a fla9 /eotfijd2w 40vjh b b3pp),n*nxx9kt 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 v mdd;a 3d.fgur e5r77/m;rpx 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 p5gdf7u;md r;.m/dr x7e3vr 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 releash+gr7dff0 5p(u37m lly, ul c nbs8-dfed 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 theh,d7ulrysc3lfbp(f u +8gd-5nl f0m7 magnitude of the normal force from the table on the incline?