07.10: Contact forces are examples of which of the fu(ad+.d /1 ttua0tznmn 9mo uw)ndamental forces?

  99.02: Which of the following terms fs*)(z0)d 0m ik *oacidr;srw6q( zxtis NOT related conceptually to the others?

  02.20: The graph shows the relationsh7 q0 ox1 b+j7rd7fropfip between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is ab frjo07xo p+fq771 rd representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a tuu*gijwj z -/v97sn7e able. The magnitude of the gravitational force oej vzu7in*/-s9j ug7w n 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 akxc7 m*5q(zwlig d fzh(5y, ;o series of strings as shl fwx 7zo(5k g,m(diq y;cz5h*own in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the ma2 zeri qovj:44o- yk;tgyek 9*ss m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M o9:jk zyvge*k;qi 2-4eot yr4rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of g -8+ sa-0abknvfwun 7the following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportio-v ng0au8f sna7-bwk+nal to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle oiabirek /p 0z0-p:b4i f 0i ira e:z0k-4 /ibppb$\theta$. 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 consaa25qbs kwruvyin 9 *5y 23as8tant speed by means of a force P as shown to the right. W * iq9ys3sb au a58v2nkyrwa52hich of the following must be true?

  99.08: A weight can be hung in any of the following four waysckrua8 1y92rb . In which case is the string most likely to bre ab891 ry2crukak?

  96.39: Assume the objects in the following diagrams hdb34kewd-w;jdoe5) have equal mass and the strings holding them in place are identical. In which case would the string be most leebdj dw);35-dkw4 o hikely to break?

  16.10: A person wishes to accelerate an oby4mjfa -gam ig+x/2k)k53 hbfject upward uniformly. Which one of the following choices must be true of the force F, provided byym4k+jmai kb2hafg x g/)3-f5 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 mov+or9y.zag6qg+ rc9rmx r c,p.es along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleramaczr9. 6+.cgo +,gqp9y rxrrtion $4.0\;m/s^{2}$ . 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 surface by ab p:goc*i3h5ce 6v1yc horizontal force of 15 N as shown, during the push, the object acceleratepyc6o cbg*c3hv5i:1es 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 e3nhyt,dj d8 4the figure 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 coefficiey4,njtde3 hd 8nt of kinetic friction 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 an angww f6+m:i jh y9bhp6h8:fu1 tjle 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 acr 2s8 sc2deq:dbxqnlly ( 18(ahoss a horizontal steel plate as shown in the diaq ( dq8nhd1ss(2by e lx82:aclgram 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 angle θ with the horizontaqics7k v +4 v,+yl5p n(u:8slansewd2l. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and theue4ysaq+7s :,i(8 vw nk5 nd lv2+pcsl static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle of s9f0yxf78n m f$30^{\circ}$ 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 o r 4wsi4gnlcr3/ z a3(lb*0gfwn 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 th3wl/g04 34zwlg(s f*canri rbe second inclined plane?

  08.08: An object on an i5 dr;idkdy/. a,v5zh-ht,c yonclined 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 grai5.v -t y5 adrkho d;dy/,hc,zvitational 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 inclined nm:. -ujvfb b w)(8rts-7ylcl72zc qhvi4ps1plane. The free body diagram of the object is shown with the gravitational force represented by W, the fricu b8qv n-hl i74)t f :vm7s( .c2jclzr-1yspbwtion 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 massqp2*q) t.*rrzfz*nl8o p 7xbr M=6.0 kg with a constant speed of 5.0 m/s strrp)z2rl*87bqft**zqx. r o n paight 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 inclined plane of angle θ . Wheom5i(u/ tub1 j2r s(fcn 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 block has a magnitude of (boufim/t2rj( 5su c 138 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 from rest at the top of a fb:sbq1jwu9 s9rictionless 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 tablb1 q9bsj:u s9we on the incline?