07.10: Contact forces are examples of which of the fundamental fis7zzd94 ka w1pz/8 *r)gxljpely61aorces?

  99.02: Which of the following terms is NOT ;rxtnj4dr00 n76dzd .ma9mg jrelated conceptually to the others?

  02.20: The graph shows the relationship betefw am *-,d to)k-*vbtween the mass of a number of rubber stoppers and their resulting we amt)w f vted-*-,bo*kight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,q5ct a,5 q4ecqbn7xoa c1)sl6 B, and C, remain at rest on a table. The magnitude o5 abx4c, 65qoac7 )qc q1etnlsf the 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 suspended1i*e 0 llf,*kuu6gewu79ldru from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest ten rwe d*llkuf,u06 9ueg*71iul sion?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k-3f5rd 0y ld1rg /kggele a/(r-d(mkk 。are statk5(g r 30yfeed-ga/ddr 1lm(/r g- klkionary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associ;jei(:u x a wp h1yn;e(h1m l(wjnhu.3ated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is m:h(h; hxewj;nu(1.3in( ap1jwely u proportional to the displacement.”?

  94.26: As shown in the accyw 2c7sxp 3ujeolw0g:8g*8sh y x ry50ompanying figure, a force F is exerted at an angle of 8j wscgy8yx g 5o0ysup0xelh*r:27w 3$\theta$. 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 const/dl )yh zlr76c8+megj ant speed by means of a force P asy mr7e68l )z g+jhdlc/ shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any 2g mm33 9t2eae 7cp4x 0mj/kphia zdl(of the following four ways. In which case is the string most likely a9m az cj0m22edk(343 ptlh7epigxm/ to break?

  96.39: Assume the objects in the following diagrams have equa-2 u emicaa: -ws:hih,l mass and the strings holding them in place are identical. In which case would the string be mc i:,hw2:-aa-siumh e ost likely to break?

  16.10: A person wishes to accelerate an object ul bf,(se88t gwgz kr(blf8l04pward uniformly. Which one of the following choices must be true of the force Fgsl48gwbl,8le8zbfr0k f (t( , 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 alons,n 1 efm/sh/4v+xwqog the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelerationeo/vq4f shxwn1s/m + , $4.0\;m/s^{2}$ . 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 r.0n q3qdmtl2oight on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniforml 2dm3loqqtn 0.y 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 slidi,z6pn; vetngkvx4 ),p ng to the right along the floor. A horizontan k,v;64)xev pn,gt zpl 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 y)q d w+nd e)ch3z*uc5a 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 acrosllced s :c-d:t0nsa)(s a horizontal steel plate as shown in the diagram A. -n)lltcc: :s( asd e0d
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 horizok3lt y1;8pzv0.; gfs*e ,wz dr zzb8ogntal. The block remains at rest as θ is slowly increased. The magnitudes30lt1.w* bp;z zzzg8 rfokdyg ,sv8;e of 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 inclined at an anglhpd:nc0ywz :l-j l5 c+e 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 g.byp t.3i u ltd;uefy3d-s1.6kob+c significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frictiogd. t+ki ubfleu c-o y.dt;33 pby.s61n between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational forj:oz47e1:xg h/d;puwcdq vz)ce of magnitude N 10 acting on it from the Earth. Which :g/):dupqc71 hoxwz 4vejzd;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 surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined pla allhhfy5i ; ;+ma9kl*6x *womne. 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 y*x h*m 56lfhka al;ml9oi+w;correct relationships between

  08.20: A person pushes a block of mass M=6.0s,-ghrdx93. i: j a0jl/ iodak30ounj kg with a constant speed of 5.0 m/s straight up a flat surfacejlx.a0aoj/kdr 9 u0ds,o:ghn i 3-3ji 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 aqlr uhw pcjv*:44 l/:gn 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 0.92qr:4/hlg:w 4clu*jpv . 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 zwof1 u4hn 2g89dvp9m rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline r82d m1p9uogh4wv fnz9 emains 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?