07.10: Contact forces are examples of whic8qce5 +bhid*uh of the fundamental forces?

  99.02: Which of the following terms is NOT related concepg)jhx r*r9vb zlg5.r4, vv g*dtually to the others?

  02.20: The graph shows the relations3 gq- en88eo;dpzn9io-e gn g6hip between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The sloonede-9 ;n36qongz 8gi-p8g epe of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and 3s9 zj mdhk 2iwk.:e(zwlux-0l vgd)3C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude2im3(s kgxkhv0d-3:ud9. llw zze)jw of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by afe)z7z. f: q 0 .d+k+kdh+ n ccj,xuridurg7c: series of strings as shown in the figure. Whic0e ). jgk+7c drxuqz,hz. rdc :c+ku+if:n d7fh string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are st*c4r id 9,rvilfl 6an,ationary.*vfn 9dr,lri,i 6c4al 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 somnm mb;s7q6(z pvy v(- c1t(icientists is most associated with the following statement: “For small displacemens-m ;m(zbm np6ivt1(v(c7o yqts 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 Fz 3l/og ud5jmkmk+-z/ is exerted at an angle of /5+m/zz3 kjk gml -odu$\theta$. 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 horizontal floor at constant l( n(wyj80a huspeed by means of a for(hl8janu( yw0ce 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 ln/h i6i y1;s;3baxanwno a;7gzv)2g four ways. In which case is the stri; iawb7 ;x 3na2 azs;6)n hngvlo/gi1yng most likely to break?

  96.39: Assume the objects in the following diagrams have jj*(c +4lpa jjhrs i4)ttyqf/7vmf 9j0e6q(aequal mass and the strings holding them in place are identical. I6vjea4cfi 9t4jtq* ry ja qj j()hp/+fm7 l(0sn which case would the string be most likely to break?

  16.10: A person wishes to accelerate anu 4.purf i-xw2w shu8/ object upward uniformly. Which one of the following choices must be true oxwiw r 2p8/ .u-suuhf4f 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 touoa.hxc45fq8ce8ze7 8o 9f the x-axis, at one instant of time, the mass hax oou a t fc4eh7f8qc5e.988ozs 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 on a rt6.r - pjtnul+ough surface by a horizontal force of 15 N as shown, during the push,p-urt nljt+ .6 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 to the right is slidinsul4 . 7qq8r :b18hxleocz(bg g 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 thql hu8z 84 7xo:bseb.l(crq1ge floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined at an angle ofvjq fdq o4y-b51k3u 3i2f1xn k $30^{\circ}$ 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 plate as shown in hcb a+3l f2hwyf q(g3vb 09r8+)mks qethe(+3 w 9qe2varkb s h+0mfyhgl83bqcf) 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 im2av;0e:xc n5 -iw xfyncline that makes the angle θ with the horizontal. The block remains at rest as θ nvi0aey:-mx52f cx;w 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 inclin,vyn5kxvvak*ssi,*xj t2 ;o 9ed 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 is signit/cvn4 g) mskby8*yyxtqdy.l9 p (*+tficant) in inclined at the same angle, it will begin to akb/nt8) vxlpg9t*sym c+*.4 y( y tqdyccelerate 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 gravzdt ,3nco l;(o58vjm pitational force of magnitude N 10 acting on it from the Earth. Which of the followinczv5ldotj8 3nop, m(;g 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 inclined surface.

  15.13: An object is being pushed at constant speed on an inclinsz2rjt3bt 9/red 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 2jt 9bzr/t 3srwith 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 wimh cf2ngy+e- vy,)9n,2 tiyv ath a constant speed of 5.0 m/s straight up a flat suryg-vma)y i9fn2+, 2,c thne yvface 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 fu-olb-qq1ip ( *s 0fjof 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 actb 0p1jsf- q-f(ulo*iq ing 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 dd.chczeojb,u m4:*: released from rest at the top of a frictionless incline. The inclinebd:mjedo,h:u .4z *cchas 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 force from the table on the incline?