07.10: Contact forces are examples of which of tm 85 nsaktqd21he fundamental forces?

  99.02: Which of the following terms is NOT related conceptu4,o j* vlkp bizm*6,nfally to the others?

  02.20: The graph sho(7j qmn*x9evo2. dsawws the relationship between the mass of a number of rubber stoppers and their resulting weight on 2 don 7m w*.vejs9a(qxsome 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 n/ f .vcs 7eaajn8.ukt-io;abwf4(9von a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact forcis(fvb /u.-kv ;o7f ej 9a. nncaa48wte on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a serir*59ex as,dpw( q xp:des of strings as shown in the figure. Which string has xas9d*,dwpepr:x 5q ( the greatest tension?

  16.05: In the figure sh+m 8satmw8uw,:w- jumown, the mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rest 8t,-s:m wwawuj8m+ mus on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of z5q0x5o kvfti8m+2 xvthe following scientists is most associated with the following statement: “For small displacements of an objexxf5v0mokv8t2iq5 z+ ct from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted a/sywx em3 e/r;q5 5 :ojk)z6y) a5zwptct/ mdbt an angle of t:/atpc) yz k 53qmw 5z56 drb /wxo/ye);sjme$\theta$. 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 alon-wqqcj* 9slerhya2 -x8c9 kv. g a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must bec qyse-92q.rj*v w 89lakhc-x true?

  99.08: A weight can be hung in any of the following fq3dn0lwkg h ,ys 2he//our ways. In which case is the string most likely to brde2 lgh,shqkyw/ 3n0 /eak?

  96.39: Assume the objects in the following diagrams have equa8 9oy ik0/rgayljvb (,l mass and the strings holding them in place al9ibrk vao/(yy,08g j re identical. In which case would the string be most likely to break?

  16.10: A person wishes cgwo4ug)m(4 6o2 oo ;s4hujvt to 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 gravitational force acting on the object. Ignore any effects of the air or of the Earth’srotath4)uu to ;w(cg4o4ov62s mgo jion.

  11.12: A 5.0 kg mass moves along the x-axis, at onvv)l dj2ix6 g9x- ckqwypp3/ 94gqs;de instant of time, the mass has position 2.0 m, velocity 3.0 m/s,anddxgwvq94yv 2pc dkg)96p-i x/l;s3q j 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 ri r15 ky)rc7)aki6or 3vwbyj6jght on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates unifvr) ij61kwr by6c)kr 37oj5 yaormly 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 shownj1om*s /ndmbqmw+53 j in the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the box as/q35n mdw bj mo+1*mjnd the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclinedix0 rowq6y :;f 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 a7-ms-nd o 2i.ijr7wjofd)k+p-xd*q u cross a horizontal steel plate as shown in the diagram A. diokj7uw oqf2- -i-r)+msx.7jdn p*d
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 angfk / dl -ju,o /bln xnqi)8n:f/q,or6sle 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 inclino , b6:lq8in-js)fo,d nu/q x/rnl/fk e on the block

  01.11: A 5 kg block rests on a flat plane inclined atl) kewyvp), byk 2+b,v 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 sj5s5g5xi. p1 ywtrhblyc (i /9econd plane (where friction is significant) in inclined at the same angle, it will beg 5 wi.c/5g 9pxytirly1sjh(b 5in to 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 gravitationasy qk-xm2m (9xb,w3yxl force of magnitude N 10 acting on it from the Earth. Whicx9bwsy3m(xx,y-kq m 2h 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 bein) dxpblv*1qi6g pushed at 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 push parallel to the incline by F, and the normal force with the surface by n. Which one of the following c1x6vl* )qdbip hoices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a consqksyk6 cf*5/u tant speed of 5.0 m/s/ quy6fsc5 k*k straight up 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 mass misplaced on an inclined plp7un 39):q-zvqf hb c g+dc67yxsv,sdane of angle θ . When released, the block does not move. It is determined that th bv cv6sqxu +97fdphd:3 sy7q-,)gczne 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 0.92. Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top ( n09 dv 9:arx5qz5l i.if5x elve,wjw4v:hci of a frictionless incline. 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 thejl 5z,hfx:dweic9 l e9ix5(ai:vv0 q4. wrv5n magnitude of the normal force from the table on the incline?