07.10: Contact forces are examples of which of the fundamental forcwekf, (s e1b:jes?

  99.02: Which of the following terms is NOT related conceptuallyllckkvp92o1ra/+ebn-b v +i 7 to the others?

  02.20: The graph shows the relationship between the mass of a n:d qbu c ;b80j*oj)m pxd(gnil0j 42ugumber of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representatig2jxdj8jp;mn0i 4 0cq*(bougu )bd :l on of the:

  10.15: Three blocks, labeled A,B, and C, remain at res+pe3 h 1;wcx6:qx .gxd4 wnprz9*wera t 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 fropw1xhrdca w e;n6+*zw3qxx 4g. per: 9m block B?

  14.04: Three equal masses are suspended from a clal- 0a:w8;gtxf- ,4ducyy j iyqssroom ceiling by a series of strings as shown in the fi0yxqci-f:yy, 8 twg;-udj4 lagure. Which string has the greatest tension?

  16.05: In the figure shown, cyp50 pm,82mt pfv08jdu j;qrthe mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting thetrcfpuv0 , jdmy;m8p2058qpj masses?

  14.13: Which one of the following scientists is most associated with the fol /x/ jl+.cneokt1p2 qslowing statement: “For small displacementsj.2xlpoe/qs+cn/ k t 1 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 d jh6pka9d z7togc.m zlzd8)a6-,lv4is exerted at an angle of g ap9l md 4vdot6dz6,-h ak)zj zcl78.$\theta$. 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 wolm,*; ncztp i3oden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Whichcl; t*i 3zmnp, of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In whicha)u- l8g,fmcabe w5le* pbq6-p * gld)pu+,gy case is the strippluae* b)dg+umll,-b - p ayf86w5g * ,q)egcng most likely to break?

  96.39: Assume the objects in the fl. upfblbo(5;p9 s*lhollowing diagrams have equal mass and the strings holding them in place are identical. In which case s.o*59blf p;up bl( hlwould the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one pdk,y0u7px+ ,+tvarf:f(g cg 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 ,v7kt 0ypg(:c+p ,fa grduxf +of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at of. nz3 th 2d ileuggz0i9)c/1r ljfzpse *94a5ne instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleratizd4)e a99 1glflpzrgs.f0uzhj*/253eiinc ton $4.0\;m/s^{2}$ . 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 horit :a 66w,m :dfwx5qr jbz)ttd.zontal force of 15 N as shown, during the pus ,t6.dx ja5z) 6fb:ttw:wqdmrh, 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 figur9 jdka3qgyq w or(f8;a13of m8e 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 ismrkao8;g9ydq(13wjqf a3 f8 o moving with:

  00.32: A block rests on a flat plane inclined at an( pph a0i-v;7rxa gkq* 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 horizontal steel p/(l5;p a8ki2lvdks hg(eg h x*late as shown in kglikl/;a2( gxhve 8sd h 5(p*the 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 8jennf f rbf.)2-t6.,ons s+jj+jpb cthe angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the inclf6 e2cjrt j,pnjnfs)bn-oj. 8++s. bfine on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angqli.6t:+ vcenle 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 -n .qj:b.h2fxucwk:ois placed on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/sx n::.qcjfk hob2-. wu. What 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 magnitudedr4lo xfd0e 6*1pa 7ow 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 paralld*7w4p f01 6xo aredolel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined planf j) rt2iy455ub rzox.s,u8dke. 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 choicer .5d 8xiyzs, ujuok2b)t 54frs represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant di lw8z4 lb 1:3ovb0epspeed of 5.0 m/s stra owli dp:8b4 1blvez30ight 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 maszetf x:vdv-8cd n. u88a2cd +bs 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 hace+. 28 dvxdfdtn-: va8bz8cu s 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 release )i2v7frlba bk )wmi,8d 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 ,im)v72) bl f 8biarwkforce from the table on the incline?