07.10: Contact force(l laqmz+9scj5 1)f6uq)xkb as are examples of which of the fundamental forces?

  99.02: Which of the following ta.qr8od1t1x6 a74z l- enk ig/xnf(cxerms is NOT related conceptually to the others?

  02.20: The graph shows the relatn; v2j-xt rh,pionship between the mass of a number of rubber stoppers annh r,jtv p-x;2d their resulting 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 resaj 6y vi1ls1za x-vx xp8 g(-(jmm7v.it on a table. The magnitude of the gravitational force on each block is indicated on the figs-- p.ay(g1m (vvxxl i6azvjm8j1 i7xure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal mas ow+7zz.su :mi) rzel7ses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which so +zw eu)s7izrl7:m.ztring has the greatest tension?

  16.05: In the figure : ,+y-wqfie,is.wte f shown, the 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 the string connecting the masses?i sef i+t.q, e,wwf:-y

  14.13: Which one of the following scientists is most assocnl iy(ci m-./9p rzeo8iated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is propor9 oyipe i.(n/8-czlmr tional to the displacement.”?

  94.26: As shown in the accompanyinj06 5ri,y bbz)owih,vg figure, a force F is exerted at an angle of )zow5bby, 6hj, iri0v $\theta$. 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 constan(co18d nko(;onyz )eqt speed by means of a force P as shown to the right. Which of the followineqk dynz1no( 8 )o(co;g must be true?

  99.08: A weight can be hung in any of the following four ty(a vg5ojj .*ways. In which case is the string most likely to break? v. jgo ayjt*5(

  96.39: Assume the objects in the foll( kqs0h 97fe*(vtoy+hwy0cwbowing diagrams have equal mass and the strings holding them in place are identical. In which case would the stringvw0 * yseoh7c(kwb0hf (9+ yqt be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly.,aj4oy 4qc zt sm26 vr4zzb52t Which one of the following choices musvzasb4zmo ,yt c65 42tz42jrqt 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-axis, at one instant of time, the mag1u 8 y5*lr/5vbl6bir)hlh wef2d0jg ss has position 2.0 m, velocit58h0ug vy1 l/w5 2bl*lfr )r6e bhijdgy 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 torq0u qx;pa5u ; 65tiuyt v.*)sfflot4 the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the rightv rfastu4); *05u5iqq. yu6xtp ;folt 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 2/m w6pr z5hnxto the right is sliding to the right along the floor. A horhx 56w/zrm n2pizontal 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 inclined at an an9xt0 y n7fmk8oz,dzh ,gle 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 puef4w + u8zdcj.lled across a horizontal steel plate as shown in thejz d84c wu+ef. 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 t- 0or-snn6ef94q1gm t o6cksehe horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of ths f0ockgm1en- 9nr 6s-6oqt4ee incline on the block

  01.11: A 5 kg block rests on abl1j 7 lr4bkz7j 045p.n rirxf 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 pdcdhp,rzsczzi4y 9gb k05-g ydf1+o 1yt1w9+ laced on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 t 1ozc-by,s yk fc 9wzgrizp01dy1 dh+d9g45+m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magn9. p v vt,qqxy6a5kl/ jdv5.cqitude 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 perpe avxkl5q. q/jd.tv5 9cqy6,vpndicular 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 o-3b4+ )9k:cttk7k3 f cnfnz a(+ jjwj3 oyurtdn an inclined plane. The free body diagram of zknf(d3ojt c w- 74a):f9kj3+yc +ut jbtrk3n 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 between

  08.20: A person pushes a block of mass M=6.0 k +vl:mzmx/h hb ug72+ng with a constant speed of 5.0 m/s straight u +x:+bgnh/h7 zumvl2mp 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 anf(pzm: txiz70h-oc e 5gle 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 represe5o0pf 7ih-z (zcmxte :nts the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a fricti4a*g yu axqs44onless 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 sliqag4y4 au 4x*sde, what is the magnitude of the normal force from the table on the incline?