07.10: Contact forces are examples of which of the fundamentalg*w.- 2.cpy r x5noytg forces?

  99.02: Which of the following terms is NOT related conceptuallye r:dbz0ac0 3f to the others?

  02.20: The graph shows the relationship between the mass of a6fgqf7/ lri +h number of rubber stoppers and their resulting weight on some far-of76 +q /hifgfrlf 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. jt ine,wh;7;om8o;l3hk cl:tThe magnitude of the gravitational forcot3mehkhc;ln;j8 oi7t;,l:w e 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 ceiling by lt) 8/*na+ln mdhla*9ulhps s+dv*kb /:,ij xa series of strings as shown in the figure. Which string has a:pm9 l bk)/n,+*u j n8tivxsd* h l/hslad+*lthe greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and thef rvk3c4;f0zpjp b. t+ mass M = 14.0 k。are stationary. The mass M rests on the;tprf0jv c kpf.4+3bz floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientistsxc -afm p2n*u, is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to tpafc-,*x m2nuhe displacement.”?

  94.26: As shown in the accompanying figure, a forcen*xre)mf(g -q F is exerted at an angle of g qexmn(*)-rf$\theta$. 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 constant sc wzyfk045 lryp5)n uuks.m +;peed by means of a force P as shown to the right. Whicmylnc+ ) 0y4usfu5pk.5kw ;rzh of the following must be true?

  99.08: A weight can be hung in any of-uem(ttde :d1rw7oqj.-k .u w the following four ways. In which case is the string most likeu1 dtdw:wq7 .e-k - .otjrum(ely to break?

  96.39: Assume the objects in the f*py 1cjux.t4eu 2z6m1 ph gme0ollowing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to jg61zcxe u1p .40*mehtp2 muy break?

  16.10: A person wishes to accelerate an object upward uniform,grpq5 mnv3 w5ly. Which one of the following choices must b,55mwpq3 gnvre 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’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at onegc cxpz9 ur(;n c)op5 1wqkc59 instant of time, the mass has position 2.0 m, velocity 3.0 m/po nwrcq9(p9ck5x1) ccz u;g5s,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 6:an sd , i)lirzqh),bthe right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right rqsdzai:hilb)) , ,n6 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-px5)+ yeq5rmdud5d: ( yedum 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 p5-mqr)m +u ed5yy5due d:x(d 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 r-qir-w5mix nez.0h5o3v 8r y 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 across a *pb//l:omj s1e8jvvy62v jd ehorizontal steel plate as shown in the diagr:vb jjlep /ysmo6d81jv*/2e v am 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 angle θ y9lf41d. ) t1a:/1nw 9ec4aht jsk*x qxobhc lwith the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of twfhl1lxn:) 1. 1kjq oce 9xb 4a4cth*ad/ys9the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flakafm*+ u.n/ncod h 8xc1p-q7nt 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 :d sbk3 :imbkpuk9 q1 95uxd.isecond plane (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 i9p.d : :1 x uis5uikkm3dq9kbbnclined plane?

  08.08: An object on an inclined plane has a gravitational forcet*8gm3:o8g zjm ov1 q,8 aexln+u:jvo of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force forglo8v8 j j:,8n ovz:1+qatm3ugo exm* 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 inclin7swur 06kk g)yed plane. The free body diagram of the object is shown with the gravitational force represented by W, t7r )uwyk60gskhe 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 ma h/:vzd6en7 hfulp*b 01:p0ol qcf.fmss M=6.0 kg with a constant speed of 5.0 m/s straight lu cqf:fodn /6f h m1 vl0:p.hbz07pe*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 mispl5*zqxz+3.s g*oon asg aced 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. g *3gn*ossz.+ ao x5qzThe 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 i/ zt-q 8e8d ksal;fn *kg7ad,of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. Thefdtaq/z*;eignkd - lsk87a 8, 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?