07.10: Contact forces 47 gn9pwi pson4 p qk)e3uy)/zare examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to tzc-d6 ) dpgaulxu3 75yxq bsg;.4 )pwvhe others?

  02.20: The graph shows the relationship between the mass4*:jd b6g ngne of a number of rubber stoppers and their resulting weight on some far-off planet. The slope 4 b *6ggj:nnedof the graph is a representation of the:

  10.15: Three blocks, labeled A,B, aw2+3g-8by( e/l vzzpe i na+l9fufe-vnd C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. agz2(e/ l --8l+f 9 3fe wvezbnp+vyiuWhat is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspw . -hqctkyn*/nqv79fended from a classroom ceiling by a series of strings as shown in the figure. Which string has thevc9 /t*hw.k-q7n fqny greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14qvxu)ghy,r5 :* b pcx3.0 k。are stationary. T *hp)5vg,bx3yuqr:x che 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 scientists is most associated with the followl5rm um:r1qqr0 zio9d rut 2esly1;80ing statement: “For small displacements of an object from equilibrium, there is a res5:2011 qtrl 9slry mzu8e drir0; qomutoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a 8d 9j f0bil/v+j (yfalforce F is exerted at an angle of / d+j09aljf li( 8vbfy$\theta$. 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 cons6ertu7-jb -z qtant speed by means of a force P as shown to the right. Which of the following mjqr bze-7-6tuust be true?

  99.08: A weight can be hung in any of the following 3i pfa+q6are*four ways. In which case ie3 pf a*air6+qs the string most likely to break?

  96.39: Assume the objects in the following diagr a.-a :ebarr3yams have equal mass and the strings holding them in place are identical. In which case would the str3ba.:ya ae rr-ing be most likely to break?

  16.10: A person wishes to accelerate an object1 1xovtv 5lxb7 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 max7tx5v1l ov1b gnitude 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 the x-axis, )jzxs1ye 4 .+wnj6svznbr9 j 2at one instant of time, the mass has positi1xjy+nwjzz.) sb 4evns6 r92 jon 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 r z. 9eut;u;ctphbdy34l wi/a 2ough surface by a horizontal force of 15 N as shown, during the pushdtp .buw2h/te;3zly c9 ;ia4u, 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 rc cw5amt d mv;r81n1ef*9adkwuf7,3p ight 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 is movita m*d819 51nmkr 3v,u7dfwcf waec;png with:

  00.32: A block rests on a flat plane inclined at an angle pg 03 d,g4vdv l,a5osot-,szjy6o2v owy0w*a 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 puwz1p.x xpg/q ko dds- (5f)s/vlled across a horizontal steel plate as shown in the diagram Askvpqfds xo/z15pd/x )g(. -w.
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 g i:/n xx0ihn3θ with the horizontal. The block remains at r0n/x ixhn:g3i est 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 j*s8j5:tdybs1b:6wmmf8dx lflat plane inclined 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 fricz*qpg ljxu t,gc3 f2.6tion is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the forcct3qlj pxgz*gu,2f. 6e of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane hax-)7hey amz8 ku)+h6zynf 7phs 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 inclined surface. 78mhfuznyp )h yx7z- eh k6)a+

  15.13: An object is being pushed at constant spee/r4.r3z94y ixkzwfrgjsqu , i 04( vgid on an inclined plane. The free body diagram of the object fg xru344w4z0r(.s, ykvi9 j/ rgqizi 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

  08.20: A person pushes a block of mass M=6.0 kg wyy bcd6-lss5i n )mvr/* n1t+rith a constant speed of 5.0 m/s lsny/td-mc)b*n v5+ 6 ry1i rsstraight 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 mass misplaced on an incliw/8e-x ut syvb9tz 5u5ned 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 fricte uu-8b5szv x/9ty 5wtion 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 is , zbx*t w*(yq),qxdawo uqo)) released 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 o)toqq(xw,u*xq*)wy,z a db) reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?