07.10: Contact forces a4pdo-guw 4taqa k,nonn8 fq32 2 -w3xv/df;iwre examples of which of the fundamental forces?

  99.02: Which of the following terms ,qz .p*tljkrs*.z k4j is NOT related conceptually to the others?

  02.20: The graph shows the relationship ixq)1 1mwdz9i between the mass of a number of rubber stoppers and their rxidz11m q9w)iesulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. i((jxv8e8do zThe magnitude of the gravitational force on each block is indicated on v(oejdz8x8i ( 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 ser m- n8qkqj0w9cies of strings as shown in the mq89wqn 0 ck-jfigure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6. ofx/6y)(iy yeo ,5ayb0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connectingb a /yy oy5yx)(fei6o, the masses?

  14.13: Which one of the following scientists is most associated with c ebxc66t,8 3lx*v7mcfmk)oathe following statement: “For small displacements of an object from equilibrium, xlbc,6mf6v 8c3mk a*xtoc7e)there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle o0z3sol/tf 0zzf z l0zft30/soz$\theta$. 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 b+ihrd; l b0zr*ox along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the fozbr+dri h; 0*lllowing must be true?

  99.08: A weight can be hung in any of the following four ways. In w .s/zl gka.a3xn8n+ozw1kt 2b hich case is the string most likely to brea1x2lza t.k wnkg+.8nas3obz/k?

  96.39: Assume the objects in the following diagrams have equal mass andk ag8qf 6x.um- the strings holding them in place are identical. In which case would the string be most likely to bre 6gqm8 ufak-x.ak?

  16.10: A person wishes to accelerate an object upwa9v) nn9mmr 8j:1ro1ev l6dup.ef ih w3rd 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 the object. Ignore any effects of the air or of the Earth’srotatio8:jlorm3hnm 1 9 n9uwefv. 1vei)dp6r n.

  11.12: A 5.0 kg mass moves+dn6 uld.aw, i along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,anddilu+6, a.w dn 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 th uhdpa-)ru2l vt.0yr; e right on a rough surface by a horizontalut .dph ;r)l2a-ryv 0u force of 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 tgz lh2g4 :ykp(jpj3a 8g5ll8wo 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 with: jggy lal8g2w jk58p(ph4 z3 l:

  00.32: A block rests on *mhx1p+b bn 2 .g lwri.7x6ksga 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 hor mmepj( zh9a26izontal steel plate as shown in the zmampe6j2h( 9diagram 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 makepi4qgn if3 (y4t iu2)w el22ctbpyvf+a+:m/c s the angle θ with the horizontal. The block remains at rest as θ i ipv2/gum4ice a+)3i(+fqw c4 fty: 2tnbpy l2s 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 flat plane inclined at an angle of g2x6e7364xuzaqcb av $30^{\circ}$ 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 frivx* cj;hv+vzyjf4 d7-ction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force f v4x ;y+v*z-j cjh7dvof friction between the block and the second inclined plane?

  08.08: An object on an incli0ty/lld d11lue8+hci rbnv3t g ./v2p ned 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 int1lurvbvd2/ i8gpnde ly3.t 1+0lch/cline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed y- hvuh/.ftw76nz1ty on an inclined plane. The free body diagram of the object is shown with the gravitational force repres.- yf 617yu/t zhwnthvented 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 s :qe+ ye7 +vxxvbqq*r3dov 7/apeed of 5.0 m/s straight up a flat surface inc q:x /q7v++ey7ba3dxve r*qvolined $30^{\circ}$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 mgab- jd2f/j as 45a.dzisplaced on an inclined plane of angle θ . When released, the bl2.fbj/s4j g5zda a-daock 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 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 Mvl1 q )hvhf tb0aw57.v is released from rest at the top of a frictionless incline. The incvl 7hwh)t fb1vqa5.v0 linehas 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 on the incline?