07.10: Contact forces are examples of t)ai gn)dr- fzjj49;f which of the fundamental forces?

  99.02: Which of the fovd4qf: e/zk6lb rd35l llowing terms is NOT related conceptually to the others?

  02.20: The graph shows the rv .h35 vkj7vkfelationship between the mass of a number of rubber stoppers and their resulting weight on some fa k3vf5khvjv7. r-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 magnjs3ndt)yb n e3c+sit) o* -wg (rd5a8ritude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on blocwb-)rn snr ca)(gt3+dst 83 o*eijd y5k C from block B?

  14.04: Three equal masses are suspended frn ;x0,8 uegucrom a classroom ceiling by a series of strings as shown in the figure. Which seunc; r ,g08uxtring has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are sta) ls5oh9egj)02p pfdxtionary. The mass M rests on the floor jfedxhgo)plps)5 290. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following sc2aj y6gv:8c4b m.oqnsientists is most associated with the following statement: “For small displacements of an object from equilibrium, there imbcsvj6n2: ya 8 4oq.gs a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angl64xugx: yn s5 03erjnte of entx4s 0yj un :g56rx3$\theta$. 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 box61e o/t /hkj:h64ge a.fvgqfu along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following v/k.e1a6g6thfu4hjqe/ g:f omust be true?

  99.08: A weight can be hung in any of the following four ways. In which ca/ az8mjff4,jug79tq dse is the su z /j jdq,9f8ag4f7tmtring most likely to break?

  96.39: Assume the objects in the following diagrams have equal masss)*idm a,xa -dtia)qq z3;pb 5 and the strings holding them in place are identical. In which case would the string be most likely to )*smi ,aq qdip5 taa-xbd z;)3break?

  16.10: A person wishes to accelerate an object upward uv64y+t 8w1nm eupbt(xniformly. 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 forctm ey 41wp6xn(btvu8+ e 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 ihv,t 1xyg+tdlp jadu. / 93(ebnstant of time, the mass has v,gy 9d(epux1d.bl3jhta+ t/ position 2.0 m, velocity 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 to the right on ak4dml 9ee6wipwv-9b;)7irl my. qk20qmi( qk rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the riq; 7.bkd-w9qm4(iew)ylq 2me irpk vlim69 k0 ght 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 slidin1v qy n;sh/5jgch69jti5bv6c g to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction b 95bjv/g1;6 5chit qy cjnh6svetween the box and the floor is 0.20. The box is moving with:

  00.32: A block rests a7) *p-0vc72nazao d7grxof k on a 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 plate as smh 9 .2acprkykx; .xmcw,-4ijhown in tapx c. -2kh;kmxwrm,jciy 49 .he 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 ang6rn i *jr 4v pm42m2mcz,bwn9jle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of thz4w6cmr9p2,mr2 mijv n4njb*e incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an1mp *wmh 0(wlx 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 is signiulz )k*z xh ftzi9+,4lh*1n arn4nu+dficant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between tn4ufuxnz,n9z+ hz)r tl*ikl+14 h ad*he block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitatirpqdhh( g m(.8onal force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitat(8q hghpr(d. mional 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 plane.1chpf bq(6 xuwom *,v8 The free body diagram of the object is shown with the gravitational force reh,u8* fc 1xbqmpw 6(vopresented 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 qyqw n9zv9: o;sy3, ;xbru(etof mass M=6.0 kg with a constant speed of 5.0 m/s straight e sqtnbqrx ;3;:(w 9 ,uyo9yzvup 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 bloxu96p(ccdef zo3b44x, zjjs6za(c3 n ck of mass misplaced 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 pla(c 4jz,cd 93s(6 oxzxe6cun pz4jfab3ne 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 fwl -zc:eeyk0 l9ms9 +dnd0. lsrom rest at the top of a frictionless incline. T : sz0n m+-dk99esy0l.wcdllehe 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?