07.10: Contact forces are examples of which of ev4dka9 w .; q62ecp2v9 vtm1gisg-sgthe fundamental forces?

  99.02: Which of the following terms is NOT related conceptuali *o 6ew2bxi-tf9te: aly to the others?

  02.20: The graph shows the relationship between the mass of a numkjh9+k eq)d q3v/4 lnbber of rubber stoppers and their resulting weight on some far-offbkd)3hkn4 q9qe+v/l j planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, a j67g(imvris9ia+cc )ecz/ ,o 2nrz(dnd C, remain at rest on a table. The magnitude of the gra scvgzr9+ j cnm)c 67ea 2zio(ir,/d(ivitational 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 suspended from a classroom ceiling by a serimowe 4,2-n w6 t:xoedwes of strings as shown in the figu-w2w6dt ,onom:4xewere. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 j*s- yzo2p;fgk。are stationary. The mass M rests on the floor. Which one of the following choices repres;-g*sz2o jfpyents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associatedky5v; g +ta9fl)8(c ehh xmht+ with the following statement: “For small displacements of an ya++ 5 ();h th8kt mcvgef9lxhobject from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exer oxerf dlc s5.1*/.y +e:+h+ 7vgeuzbr -hzxfited at an angle of y7goex .z.rde-5c1u ++: vsbf*x/i+ezfr hlh$\theta$. 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 ciue07q9 ytv)7w* tg vrough horizontal floor at constant speed by means of a force P as shown to the right. Whqtv9*iu yc0twg) 7e7vich of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which j*a*w(r z* t 0tqpcnj4bwl9vy:7bc 9dcase is the string most likely to a0nj* r*b9vzcwb tt(y : qld9 j*wp4c7break?

  96.39: Assume the objects in the fg ajb(24ow(n wollowing diagrams have equal mass and the strings holding them in place are identical. In which case would the string b jo2(4wanwg b(e most likely to break?

  16.10: A person wishes to accelerat3 o3esg7:ygum0 dmdop/ca3e7 e an object upward uniformly. Which one of the following choices must be s3 ame3g07cd7poody /3e:umg 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’srotation.

  11.12: A 5.0 kg mass moves along the x 8,sdqnt*mu schi.x* 5-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,andi*.s 5,sdqc u *m8hnxt 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 i:e2.sqkx 4so js pushed to the right on a rough surface by a horizontal force of s eq sjk:42o.x 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 to the right is sliding to thdd n q9w/gzy*6i. uzn5e 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. Tnq6*/u.9nz d dwgy 5zihe box is moving with:

  00.32: A block rests on hucugfwn5lt t.sh1 yf+4p3e :q2 .a4va 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 first pulled across a horizontal steel plate as s, 4bkrow:.f5hku9 bpyhown in the diarby5.wk:k9uf4 ob ph ,gram 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 a-s/gkr b s-ke7h,y0ydngle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the staticr -shgk, sk /b0d7-eyy frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane in mq ilw:r3n o5fx-t 5ga8d(zn-b2:yeuclined 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 placedpwuyk+u 9nyqsofq .dd+ 427g; on a second plane (where friction is significant) 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 the second inclined plane?p7qqo.d 4;ywg+us2 k du9fn+y

  08.08: An object on an inclined plane has a gip eg3r6sq iwzbx. -/g k5x;l-ravitational 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 perpendicula6xs- rl3i /e.-bxki; gqg z5wpr 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 inclined plaqy,**8iq a 6yu tof,dsne. The free body diagram of the object is shown with the gravitational force reqf ,* yuao,* qt8yis6dpresented 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 with a constant speed of 5.07xy1gb2d9 n; 2lk+ olyhaze gmsbv 7-2 m/s straigx+ ym 9ogs7h2g1k y vd2-ab2lne7l b;zht 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 incly 1v660 1a 4,gsgp,vixrhujacined 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 fri4xva1 g0cpygirjv,u 1a ,66shction 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 released 2j1m - f irqr( jyz(q-- rvymuj*,c4ehfrom rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline reym rm r-q qz-r,e* uj (vh4cijfj1-2(ymains 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?