07.10: Contact forces are examples of which of the q 27omybyf/bhs0cq/- fundamental forces?

  99.02: Which of the following terms is NOT related conceptubi ql:nyr/2cg 1;drc6ally to the others?

  02.20: The graph shows tt j ytqy1*y52che relationship between the mass of a number of rubber stoppers and their resulting weight on some far-oft1y qyc t5j2*yf 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 magnitu zpx3q19lv5/if urrj q .obu-5de of the gravitationalbr.uu5vzj1 /x5i-fq 3 rqol 9p 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 classro3g )/v tp-2xoii akh)m,7xfgkom ceiling by a series of strings as shown in 72gki om-f pxk3xav)i )ht/g,the figure. Which string has the greatest tension?

  16.05: In the figure shown, thm1y( wjjj6 s1be mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M restsm1(syjjbj6 w1 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 scientis,0mlzqd)39h8tunt5s lpyjs4 ts is most associated with the following statement: “For small displacements of an object from lz 3 ,d09s)q4n5 juy8slt tphmequilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanyi 8l02u g/4fivi 5scs y*xjgrx)ng figure, a force F is exerted at an angle of / vj8cs)xxs gi52gir4ly f*0u$\theta$. 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 constaxq,x b-ii ;b9ant speed by means of a force P as shown to the right. Whx,qb -ab;ii x9ich of the following must be true?

  99.08: A weight can be hung in any of the ,v)7 jcek*,wcug9u;p 8gh n as ds39oz2ze.hufollowing four ways. In which case is the stria )e 2 dez7su*;vcwshnckhgp9u8 .o3jz,g9u ,ng most likely to break?

  96.39: Assume the objects in the followiycwg:n- i *zu )p:mrxczpzu 6o1-.7dtng diagrams have equal mass and the strings holding them in place are identicax- *to mi:n pcy.gc6p):dz1r -zwuu7zl. In which case would the string be most likely to break?

  16.10: A person wishes tq.rm8 r /u a,say rsu+k9oj/ ,tqjg*t1o accelerate an object upward uniformly. 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 gau/gr js1srtyaj,rk+q t*8u,m/o9. q ravitational 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-app-q oi+af.z m :7mmf3rtmi0)v2br u2xis, at one instant of time, the mass has posiv3:omrp+ 7b2u0 p-mim.za )r2tfmqfition 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 a rough surface by a horizai.qaomckg;e ec/ z * ;6e7.xcontal force of 15 N a ga kc/e*zcci;m6 ;e. exq.o7as 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 f,h i0mom)o q.to the right is sliding to the right along the floor. A horizontal force of 10.0 N is of h,m.0)oi qmbeing 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 angle of dl+z n:t0w23wa9ly ha $30^{\circ}$ 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 pul i+e)t2-ddi;h 7kjbar led across a horizontal steel plate as shown in the dr2;dki )7bt-hi a +jediagram 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 dksl .olz)m0e)8wk2mkf 36g han incline that makes the angle 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 the incline oned28 lwk m3)h6lkfzgk.m o)0s the block

  01.11: A 5 kg block rests on a/ f)sy8y sfr ipmd67/k 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 is signi dn;81ek,hl0 pcjvug+.fmf 1aficant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the forcefm1 8d;lva0cfkj nphue+,.1g of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational forc9e/m tloarscqmxa; u. (ip (34e of magnitude N 10 acting on it from th/i a;treq ox(uamlc.9p(ms 34e 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 surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pusau;,0.(qspq sanw6f kc( v1idhed at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represensu;npwak v6c(i.1a , d0q( qsfted 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 spe +0gw use/f//u zwwjmxr* y5i;ed of 5.0 m/s straight up a flat ez*w 0;5xm+ijw ru/y/ ufws/gsurface 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 inclin b n)6a.k8bgjor(:jg ked 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 6r6a:8gj(ogb jk)nk. b 2 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 represents the mass,m, of the block?

  17.40: A small object of 4; s:n.yj/gducp q v7vmass M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remaingnj/u7 qs ;cy4vdv :.ps 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?