07.10: Contact forces are examples of which 0v v; hi:yhzdd* ij6o,lbc 8nysuj.7 ;of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the others? a+of.rsg;:7 i1 agfqn

  02.20: The graph shows the relationship between the mass of a (-x1pbwq qbn7 number of rubber stoppers and their resulting w7q n (qwb1-pxbeight 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. The mn:o tl3l twx -:wa45yyagnitude of the gravitational force on each block is inot y-awnl:35x lyt 4:wdicated 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 p-e:ive , c)tg5o e*uaa series of strings as sh pt-e*ieoca5, eug):vown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, thees 8/ a.ycek p6bh1/ws mass m = 6.0 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 th/bp6 .8kwhseace /1sye string connecting the masses?

  14.13: Which one of the fsil,+le2y5 y jt3-i ohollowing scientists is most associated with the following statement: “For small displacements of aiy itoy,l+h e-2l s5j3n object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in txfp d+qnmb22:, teld; he accompanying figure, a force F is exerted at an angle of 2;nxfp ,2m+lb:dd qet$\theta$. 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 floy2e im*xf3fw,or at constant speed by means of a force P as shown to the reff*3 x wm,2yiight. Which of the following must be true?

  99.08: A weight can be hung in any of the following -e)y 10e:pc 2xkksjo jfour ways. In which case is the string most like01:ec)xk yp-s o2 ejjkly to break?

  96.39: Assume the objects in the following diagrams have equal74h9d gcs ;xwd/bu ,ww mass and the strings holding them in place are identical. In which case would the strinhw;9x, bd7uc4/ gdwswg be most likely to break?

  16.10: A person wishes to accelerate an object upward unislhu+(i e4*m4qztj 9 e44dhnoformly. Which one of the following +enl4me4(j otzi *d4 hshq9u4 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’srotation.

  11.12: A 5.0 kg mass moves along the x-axig t*5it/*p mlvs, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,a*tit5*v /mgpl nd 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 thekszd7 z:+8 zcd right on a rough surface by a horizontal force of 15 N zdc8 zkz:d+s7 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 z0 u3cn 6mmv7as(aw+d the right along the floor. A horaw zcs30d6mu+nv(7m aizontal 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:

  00.32: A block rests on a flat plane inclin g*q-zjabt l gaszsfx*.k02:3ed 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 steelqyh2 llu (vexq42zofsh4, (- q plate as shown in t u ,y(ev sl4q-f z24(qx2hqlohhe diagram 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 horizontaa3z pq,*,b(yi0/oy2jv 8ulp nneeml6l. The block remains at rest as θ is slowly increased. The magnitudes ofyyn vpe ali*8 63(qonb uzl,m,/je0p2 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 inclinedtx7bzm3pq*k5v k5x9h 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 placed on a second plane (where friction x9yvwb 5ja8 j9exwj) +bnb,f7i7p;aiis significant) in inclined at the sayb7 bb v 7w99jj+ a5,p;wfjx8 aenixi)me 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?

  08.08: An object on an ib2s1 tms0cgf0o( zxc+ a/ *jnmnclined 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 coord0xboaz/cfm+tg( ncj0s 1* 2sm inate 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 oh 0j3aotmz:dksd, z5*n 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 betweezz saoj0m*dh 5t,dk3 :n

  08.20: A person pushey:din u)wbiy na0l7-qcsa+.1 s a block of mass M=6.0 kg with a constant speed of 5.0 m/s straighawni0-y:u.syba)c1d+ 7 lni qt 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 mi umt/mb0d,f br:bf) m3dra(4ed coy + 3l+jnv5splaced on an inclined 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 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 massob fcb/jm d3 m30 (mb)5,d4rta+vlef+u:dyrn,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a frictionwbnh w:qvg,e :mm9 :m5less incline. The inclinehas a mass M and makes an angle θ with the horizontal.qeh mmw5:b: ,:mw g9nv 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?