07.10: Contact forces are examples of which of the fun s2(cvi(n0kpk2 4b1ylg: osjadamental forces?

  99.02: Which of the followin,w:kkv skz44 ldx2-10hga rka g terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a numbgn/iea 6 3vjy,er of rubber stoppers and their resulting weight onviey63ng ,ja/ 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. 8iz4k4*fqii c q(:rd lThe magnitude of the qc4r *kfl ( i8d4iziq:gravitational force on each block 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 classroom ceilit xtq/9q :g(s.qv2 cking by a series of strings as shown in the figure. Whivtxqk 2 cs.t9g(/:qiq ch string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。ar;(jh+xqpw. fd .l4 xxre stationary. The mass M rests on the floor. Which on.rdj +wx lfx(.q p4xh;e of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associat cex xvop 1(t-h+q.-ehed with the followin+ qtheoh1e-- xp.(xvcg statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in ttz,atb2s)3 h che accompanying figure, a force F is exerted at an angle of ),s3 tbz2h tca$\theta$. 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 roug-4zl i 2+wdj m;)kum3oyn8bmzh horizontal floor at constant speed by means ofiw3d -mz m;8lky24 u)mojb+zn a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. I8o9l(uryfu y2 n which case is the string most likely lu2y 9(y or8ufto break?

  96.39: Assume the objects in the0 163wm8wwooooc ibp5 following diagrams have equal mass and the strings holding them in place are ide35owo0pmo1 cb wio 8w6ntical. In which case would the string be most likely to break?

  16.10: A person wishes to aj h8-ns,nquwlxq -vbr/c5i,- bw )i(fccelerate an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto hbw5fxcvs,q- n,lib wri/n)-u8qj -(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 tpu) u 2-*kloxp9: ezsrhe x-axis, at one instant of time, the mass has position 2.0 m, veloclserux9uz -* )ko: 2ppity 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 puvj q5 (v(ar2ohshed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object acch5jv r(ova(2qelerates 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 slidinr5 0r qt7)hpozxk/z0 eg to the right along the floor. A horizontal force of 10.0 N is being applie75rz0/kq to0 z xreh)pd 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 angle of b9qq7eg ()qb spyi0 -a$30^{\circ}$ 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 f q7 b+s4e,cvu 4k;tt-u4f ktz jbq)hp;irst pulled across a horizontal steel plate as shown in the diagram A.tvktt;j4p bh4ufqz-uq e) b;kcs+4,7
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 a5q; yp pppur-bfyj sw5m31 cby-(.+tynw *l -tngle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force andqj5 c+-n-pp sy1b;r y*tmplu yyt5pb f(-w .3w the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat planeui 18;w1 f,gp2su *sn.a j54hsyvyoly 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 planebld,rx nl-1;y (where friction is significant) in inclined at the same 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? xl, y ;l-rnd1b

  08.08: An object on an inclined plane has a gravitational fow)n3z3( zhc mxxe/s7drce of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gdxx 3/(zhncw3 e )sm7zravitational 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 cf0+vq pm+ pcailg.( -donstant speed on 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 parqgi(0 lv+-p+.dcp amfallel 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=6.0nxuxuo 0 y6o;3 kg with a constant speed of 5.0 m/s straight up a f3x0;u6yo o xnulat 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 misplacje4: ijf7 /bnced 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 7ei/ fj: njb4cfriction 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 M is re pb vd/,5az y(.;gm qt)+xixydleased from rest at the top of a frictionless incline. The inclinehas a mass M a/pm qyix z) ;y(+td5,x.gda vbnd 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?