07.10: Contact forces are examples of which:2 fix2yzhv8 eprm/ kfv.*k *v of the fundamental forces?

  99.02: Which of the following terms is NOT q x)t 4qxow 7s3gv8m;prelated conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubbe7.vrgnr)/nji- ;jl0 eciyf n6 r stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of the:innnye ;l) gjvi.cr6-0j7f/ r

  10.15: Three blocks, labeled A,B, and C, recaew:iqq / * 4+83 gme5ka bvza)5scwq)a9unx main at rest on a table. The magnitude of the gravitational qea k8n a/5+54abswc ew qz3 )quxv:mg9aci)*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 ceilinw;vtlpv01 r 7q 9nhkelpjp09 5g by a series of strings as shown in 0l90h;n rql91 ptpk7p 5wjvvethe figure. Which 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 stadet g 31p ln4rqqx,6s:6 (bulztionaryle 4,q d(u31 spqg6tnxlzrb 6:. 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 scks/q( )yenc(e ientists is most associated with the following statement: “For small displacements /eck((yqne)s of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in thosad.l.iq 0q8 e accompanying figure, a force F is exerted at an angle of a.i0lod8 q .sq$\theta$. 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 pull5w4 48.fpd qt9iglndcs/tz9l s a wooden box along a rough horizontal floor at constant speed by means wz 4ig qlp9 t5snc9.4lf8t dd/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 whicr:hyr1s1wr/5 0ojylr/il t(rnd*z +nh case is the string most likelyr 0nh5ly(yjl/ rnri1o/dw1+s :tr*rz to break?

  96.39: Assume the objects in the following:7eyr gm)vxacka5 ) c+ diagrams have equal mass and the strings holding them in place are identicalgk ace7ry+)5m:c)v xa. In which case would the string be most likely to break?

  16.10: A person wishes to jlh5 b9xh1* lnv) 0.dybv2zz +h1l souaccelerate an object 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 magnitude of the gravitational force acting on tjxb*+b5l1ol19v v2hh uld n0s.hy)zz he object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis,e233l+jraksu ek obj5lzu1*8 at one instant of time, the mass has position 2.0 m, velocity 3 el*3je2ou lr8j+ ks5u3a 1bzk.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 surfacepu.),goda) h(n dv*pwf+hs9s by a horizontal force of 15 N as sho (a g +h9os.fh*spn)vdudp,)wwn, 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 figurt015kf l.v e x60puvrve 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 is moving 1pxvl0e 0.vrvuft56 kwith:

  00.32: A block rests on a flat plane inclined at an angle of5cyf b5lsgfczcqjg0+i 2: k;o( go :4l $30^{\circ}$ 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 platebbmu5t 6*- shz as shown in the diagram A. *tuh-m6zbs 5b
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 inclineius v 75b8lc6l that makes the angle θ with the horizontal. The block remains at rest as θ8vb67l5 scuil 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 refn:wkf9e(, zxsts on a flat 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 iz2ou p/ goy-i6s placed 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 forco2 y-zip g/uo6e of friction between the block and the second inclined plane?

  08.08: An object on 5pluu ib+8e9 71ogvwman inclined 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 p+5vgu7 pw8ub m il19oearallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined p q6xk21( nzh3yhvy2c ; iqt0sulane. The free body diagram of the object is shown with the gravitational force repre;yny hq01scixkq 2vt6 2h (u3zsented 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 masso0p3x+;jhp z10 lbco b M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclined ;cpb0h3+ob0 jxl1 opz$30^{\circ}$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 pla6gbo7-( vdiy gne 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 bloc (obg76yd-vg ik 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 fro r*d ak7d(v0bfm 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 force from the table ob kr0f dv(*7adn the incline?