07.10: Contact forces are examples of which of the fundamenta.jce2 925 l puj7 0 ndzi5pdt.l8sum 5nqf(rxcl forces?

  99.02: Which of the following terms is NOT related conceptually to the omuhutf46 3ul i4pnwsi p2 m+m;1kp,e 6thers?

  02.20: The graph shows the relationship between the ma)s5 r8he lusv4ss of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of tv5e)s8r4 uh slhe:

  10.15: Three blocks, labeled A,B,0mlo ./pj+cr czk cp;5 and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is tp/o j k0c .5lccprz;m+he magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a se 4wfwp6vfo 5w6ries of strings as shown in the figure. Which string has the greatest tension? 5fo6 vwpwwf 46

  16.05: In the figure shown, the mass k nmq)1 ulc9soyejq;.xqj8 5ws3*6f dm = 6.0 k。and the mass M = 14.0 k。are stationa)qw .m;9 qs*6 ckex d 3jlj1so8yfnqu5ry. 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 scientists is mo2ofnu1fdj;)nnl 97 a gst associated with the following statement: “For small displacements of an object from equilibrium, there i9 n;ffa 7gu1lnj2ond)s a restoring force that is proportional to the displacement.”?

  94.26: As shown in thq5ejli c06,xgc 9zypr5.+vo u9uqv9 fe accompanying figure, a force F is exerted at an angle of 9,gqjyerq90f i.69l uv zxc cv5p 5o+u$\theta$. 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 horizhh..eqnag: s k*/tpr; ontal floor at constant speed by means of a force P as shown to .h k: pr;eh g*a/.stnqthe right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which cojosvnqy c1*5 3r tw.;ase is the sos3*;c qv1wjoy.t 5r ntring most likely to break?

  96.39: Assume the objects in the following di g(jd2hdjbr 42agrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to brhg4(2b 2 jddjreak?

  16.10: A person wishes t::( txiid6 bcoy yfx4cgu/i.z:a8u) no accelerate 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 foc cxg/i.:o z8axb:fu4:ud6i y()in ytrce acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves alo*,3x3 wddp loong the x-axis, at one instant of time, the mass has p*3 pxwod,3oldosition 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 tm /yl- szri ,;f7 v (m(g8o.z-vwsbfgche right on a rough surface by a horizontal force of 15 N as shown, during the push/z (-vgi8;s( vm .l-yzsrf og7wbfmc,, 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 figurjqs 5/8 gz rv3iczj55we 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 frrgcz5 /jq 35sw v85izjiction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined at mxhc/;oc6;9r74iagiv/ a jfcn:ep 1 nan 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 fir 3jxpnzv,+ ) -)f3jmxindrw1 oahvf7 :st pulled across a horizontal steel plate as shown in the d,pnf): ozhjfi )3-j+3 ma1x nw 7vrvdxiagram 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 angzwq ygs -5l(w9le 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 incline on5lywz(-g sw9q the block

  01.11: A 5 kg block rests on a flaruy eo7yh7(bu - 8nj8ht 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 pobzp 4*3g 5)vzhhk1 hvlaced 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 s5z4kbovpz)h3 hg1vh* econd inclined plane?

  08.08: An object on an inclined plane has a gravitational forceh iw4o-b-2, h1 ypmuae of magnitude N 10 acting on it from the Earth. Which of the following gives the correct com a2pw1-y4b h-iou ,emhponents 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 constanties+ 6d9xg ku1qa e+olm.4;pl speed on an inclined 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 with the surface by n. Which one of the following choices represents correct relationships dge+ q1 oams9 ux.4kl 6plie;+between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5.0 k)gov-jsf0 -qm/s strjg--qs) fk0voaight 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-h bqsc wc81-6bl+x,p r+rnia inclined plane of angle θ . When released, the block does not move. It is determ-68bpsarcir c+1 qb-x+hw, lnined 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 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 g818ffh;8g1tb,65hl z fkilgy vu r5lfrom 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 tablk gbrufg1l55ivht 8fzfl yh,g;868 l1 e on the incline?