07.10: Contact forces are examples2h yfm *yz.y7p of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptuaqn 9i0+( n tmup4u:gctlly to the others?

  02.20: The graph shows the relationship betwe0qiy)wwy*p l 5en the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representlp0 yiqwwy5)*ation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. Th+b x+ijmvy3p(2*z dh fap5j*d e magnitude of the g+zd ji(b*vfh+pax j2*5y p3mdravitational 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 ofgp+3f 9b-mx67as ilare suspended from a classroom ceiling by a series of sta- 3mbffxil9+7so 6pgrings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown)b:er2/g0opea xuis+f 9 gx.u, the 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 choices represents the tension in the string connecting the ma2auux xg): gif0b9o re+.sep/ sses?

  14.13: Which one of t.b: hqw1sz,x +3 vi l4xcnzn:bhe following scientists is most associated with the following statement: “For small displacements of an object from qhz ,nn l.v3:ixsbw4c x :b1z+equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompa,nfx5 kjjcsx;kd58 9t nying figure, a force F is exerted at an angle of nk95t58, fd;jjs cx kx$\theta$. 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 wood4qrn0 bjmh x4;en box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Whic0;bx44m hjn rqh of the following must be true?

  99.08: A weight can sfj-da er408gbe hung in any of the following four ways. In which case is the string most as8ejr4d fg-0likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and ,6 n+8 g3ei0x9ejozfsb p byt*the strings holding them in place are identical. In which casejfeiot* 960ebp+ z 8g,3xny sb would the string be most likely to break?

  16.10: A person wishesf30jp z 748kar: jc:pfs ocdj1 to accelerate an object upward uniformly. Which one of the foll:4prj: fdska1 c0jf3jz o7 pc8owing 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’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of t/6po5v 4d7phau eqaa,ime, the mass has position 2.0 m, velocity7a,oda/q phua5pe4 v6 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 tsy i2 7)ofa8nthe right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right aa t7f28)ynsi ot 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 them4u: 2. uda-o)mdp g tt78gakv 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 and the floor is 0.20. The box is moving pu.t2vdtgga)a-umd :8ko 7m4with:

  00.32: A block rests on a flat plane inclined at an angle of f p,z3j4 faz(7f4* yjqrrsw1s$30^{\circ}$ 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 acqg:kn.vn)2b aross a horizontal steel plate as shown in the diagram A. k2.:nq )vgban
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 horizontal.hevmi0 x+ltht-: + bd; The block rex+mi0hh:tbl + v;e-tdmains 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 iculv fcud:r5cy;q (r57d4 uj8t 3 5hgknclined 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-v ,ncuv(f.w 0;xvcz n a second plane (where friction is significant) in inclined at the same angle, it. ; (vcvwzf0n-, cuvnx will begin 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 /q c:3g(i it8fa2 xtkgsduw+;gav);za gravitational force 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 tvz):fig;wad;tc8u3qi2 ( g/ats+xgkhe x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined pa33ko fq: lf/ o,1ocuolane. The free body diagram of the object i/foa3f,oul3 :q ko1cos 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 correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5.0 mn1rk1a 2( fsok/s straight up a flat surface inclined k 1nrf1skoa(2 $30^{\circ}$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 m8/exhwj7a :yy 5m kd/on an inclined plane of angle θ . When released, the block does not move. It is determined that the normal force akdehy /m:58w/xj 7 yamcting 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 re(gfbe mk h x20b/24i1uqktl/ wleased from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a tabl0bg/m21 (2/qheli kuw4fxbtke as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?