07.10: Contact forces are examp-1mb m9i1b74 eoyul 8m2zifpmles of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptuf5:bdsetr7 ozws(s: g ns9 (p5jow8-4oi4ja aally to the others?

  02.20: The graph shows the relatiowlff *59n*lu xdgy/gha f 9v*7nship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The s 5nxuffvg*wf*llg9/ 7 a9y d*hlope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magv,)cu.rukr3 wnitude of the gravitational force on each block3ur rcku .w)v, 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 classroo7sdf5x*, wzlz t*b w9r w7,cmfm ceiling by a series of stl, 9zf ms*5zx,d w7btw7rwfc*rings as shown in the 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 kt j6 paadgl9+ic*u,i3 。are stationary. The mass M rests on the floor. Which one of the following choices represents thjl ai +gdt3p6 u9c*,aie tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the fol :fykkc(t.x m )-q3dl5jcxk3 /mqlyf6lowing statement: “For small dj)md- m 53.c/fcx3lk (tfkxq 6kyq:ylisplacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exertedlr)0 n t0e9mlr at an angle of tm0rl9lre0n )$\theta$. 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 consta9vkp ia (e+6ay fa p8)trl1x,bgv-( iunt speed by means of a force P as shown to thgt)f+u6( xi- ka9pyae v ( p8vl1,irabe right. Which of the following must be true?

  99.08: A weight can be hunqysv ywh8, p-;g in any of the following four ways. In which case is the string most likely to bre -hvq8;pysyw, ak?

  96.39: Assume the objects in the following d2 le;gmtz: x+0vuszmpd7fm5g6, w d. uiagrams have equal mass and the strings holding them in ,250.dzpmw mfx:su+uzlgm gt6d7ve;place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one i-n+h a,n1ionof 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 a,+innh1a o ni-cting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moveutu at5e/4s :ai87-2cw)wnf; pkcm ays along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleru/ccuta s 4;em5wa8:y -7pk) wa ti2nfation $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushed o2:es:c9 ;axkvmkyr 3hn1ym1j3qsy -to the right on a rough surface by a horizontal force of 15 N as 33m:1vc 1yqyh;j n y :skxrea9-2ok ms 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(q fhh*p 7mw oe8s r/mdw;ew5, is sliding to the right along the floor. A horizontal force of 10.0 N is being applie 7wsohm e8(dw5r;hqep / fm,w*d 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 u:0vethis;./ os ojhsjyv4 +/ 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 horizontal steel cifv, t:nq4*l3qek0 m plate as shown in the fqnli,c0e* 3tv qm k4: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 maar:u)dj go)f90 wms,hkes the angle θ with the horizontal. The block remains at res9 r)wgdo),hjamsfu 0 :t as θ 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 reqz4tz75 bo(ifpm uu; r-kb0 3rsts 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 is placed on a second plane (where friction pac*2;r)m/q 47l5x b oldnhchis significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s.r *pc ; hn)o a475/hdlm2lcbxq What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravi z lws 1p*kfww+:+l6; 9leeloktational 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 surfac6*sz+l :+e; pwk ef1l lwokw9le while the x-axis is parallel to the inclined surface.

  15.13: An object is being .tshqu e4zsc.:jf .d/pushed at constant speed on an inclined plane. The free body diagram of the object4/.qczdutjs .h.s: fe 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 between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5.0.wb5t 3y kqm7s m/s straight up a flat surface incl q.wk5bsy3tm7ined $30^{\circ}$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 planejl5fmu6 jg 411k7j g/w 8vyibo 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 g/iwb6f 5 k 81yg1j74oljjvummagnitude 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 from *ii m(r8m w)vbrest at the top of a frictionless v wm)*ii(m rb8incline. 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 on the incline?