07.10: Contact forces are examples of which g) tezz dml 8p4btw+jzm560+.b6nj cbof the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to j7s *0r8kaorrk j.f8vmy/ 7zf the others?

  02.20: The graph shows the rela9j y)ygf: xqy/tionship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of th)x:yqg9/fj yye graph is a representation of the:

  10.15: Three blocks, lbg4g6 u8m qz9nm l)kl*abeled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the con89 k*m4z)qlmn 6glb gutact force on block C from block B?

  14.04: Three equal masses are suspended from a classr4ezs */gr n 8u*nte6mioom ceiling by a series of strings as shown in the figure. Which string has the great/nit4nu z *sem*86er gest tension?

  16.05: In the figure shown, thnq8;6 tyzvo 8 *bt3 9tzfzqfo(e 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 c3otvnzfo yt;qzf9z 8 *6q8bt(hoices represents the tension in the string connecting the masses?

  14.13: Which one of the follow qiycxk:1 )7/)ljvaicing scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a res:ai 1ljc)/qvyk xc)i7 toring force that is proportional to the displacement.”?

  94.26: As shown in the ; d p 4d:xvh(u4aeuwo2i30pscaccompanying figure, a force F is exerted at an angle of :h 3uevp;o 4a (iscd2wd4 uxp0$\theta$. 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 hqz,- 2qi *s 9aqtickv6orizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be truev q-2qicq6,is t*9zka?

  99.08: A weight can be hung in any oj 6k6teq9 zji*f the following four ways. In which case is the string most likely to b ietj jz6k96q*reak?

  96.39: Assume the objects inc1-q k4wvl.r z the following diagrams have equal mass and the strings holding them in place are identical. Ivrqw.1kc4- lzn which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifor bj4, zug+t :r9bcss2omly. 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 gravitatiobu,c2tbzjsrsg 9+4 :onal 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 t; 1n/y8p5ngr ,h.uge tjj0/yj0x hfcjhe x-axis, at one instant of time, the mass has posit,nhy;jg 0 hyjxg u/n 0pfctj8r/j.e51ion 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 dp85su1n(nj7g 7a1cqir 1eln pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerat(78nn d ceragns5q11l ji1pu7es 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 thk dg j6)b dg3gkyh1d2dw9-8soe figure to the right is sliding to the right along the floor. A horiz2k31yb6g)dd s9gd- ow hg8 jkdontal 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 a jlcx 4cm 7 ;vo;d39f;zf,ygddngle 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 puxgvj:x no (7zgj:ea nh+:(r9illed across a horizontal steel plate as shown in the9roz7h:+gnx:a:ej(v xji ( gn 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 anglew zzm0db x54 *w/)oarh θ with the horizontal. The block rrwzomz5*h)d ax 0/wb4emains at rest as θ is slowly increased. The magnitudes 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 **x*(ptp 1 ;dwf;rv jlhwlj.r 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 fri(wz-f;lllf) fa5wlluezpo bp1;*)c 2vu lh8*ction is significant) in inclined at the same angle, it will begin to1*)lp)ouwa(z2lz;f l llb 8-ewfv l 5*;hupf c accelerate at 2.0 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 fo0jpgn i/zx6nia-xv; 5 jwg 8x2rce of magnitude 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 perpendicular to the incline’s surface while the x-a jxpxi2i-g6/;a8 xwngnz0j5v xis is parallel to the inclined surface.

  15.13: An object is being pushed q9nq3(c zx2f.;4jco h ntgy1lat constant 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 pus1qj(gn x3hncqtz9.o;f42l c yh 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 bl5ft y+ udiejmg ,u/t j1 y;+z*og7yyr.ock of mass M=6.0 kg with a constant speed of 5.0 m/s straight upey *jyz;tu .y7yut /5+1dg, fr +gimoj 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 masmi35nh4ez :x ks 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 betweenze 3mn 5khx4i: 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 objec;.bspubpkw0 +n+/,s olx 5xqvi/q yv.t of mass M is released from rest at the top of a frictionless inc5uxs +xq.pl/q;bnw o y+ki,s.pb/v 0vline. 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 slide, what is the magnitude of the normal force from the table on the incline?