07.10: Contact forces are examples of which of the funy*w-g. qitn3k damental forces?

  99.02: Which of the following termczwkkx 4/f*pt)m d-;e .bs5m koo fc:(s is NOT related conceptually to the others?

  02.20: The graph shows the relationshi 3g. q49nlhow*au0u gxhdsb09p between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. T g9 h9xaqs b0hdgn3u0l. w*4ouhe slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain ar1tnb:;cn9 lw cb6h:ht rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. Wha19t: rc6 nbhlwch; nb:t is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspende7cmbp rv9 mi-:jte +vk80*z0hd ;byfsd from a classroom ceiling by a series of strings as*jbdcfs+ y 90piv:e7vrm-;8z bm kht0 shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m i9;myir1q,y y = 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;1ymy,ii qry9 in the string connecting the masses?

  14.13: Which one of th 0fqelqx20z1 wrqz6 n5e following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportionqwx6z rqe0n0l5 zf 2q1al to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerteprjy 5s1rc 0g6+zbjm1 *hn1fud at an angle of jru1gy1s +056 mfbp rz*hnjc 1$\theta$. 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 horizos0n3/w3vinwlg vm 5g7ntal floor at constant speed by means of a force P as shown to the right. Which o35m3vw iln7wgnsgv0/ f the following must be true?

  99.08: A weight can bc3dp r/fqowu + t)7r,be hung in any of the following four ways. In which case is the string most likeld ,qou) tpwc3rr+f7 /by to break?

  96.39: Assume the objects iqma rrn9b8 l.2n the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break? rq9bnmar2 .8l

  16.10: A person wishes to accelerate an object upward uniformly. 3sqtshc1y mymby1967 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 oyy9 y17t3 mq1bm 6scshf the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the massv-( n xqpfdtwn,e(y6: has position 2.0 m, velocity 3.0 m/s(t:edf,qp6xny nv w -(,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 hoau/ p.u/e+5wc9gjrkq rizontal force of 15 N a/aujgekwu +pq/5c. 9 rs 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 l9z z0f3* r qajdqp,t47i6mzffigure 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 fp4zqmfzz3 d6i9,t0 a7lfrq*jriction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclineo 1;d7k*6gxnm a09frqxs x(fyd 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 acj9swo+serygyv03:fqf ,vk )7 ross a horizontal steel plate as shown in the diagram A. 0ssy3v+7g 9:yf)e,q f kw jrvo
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 angleubv1nl sr32ka v6hze vug ;/9. θ with the horizontal. The block remains at rest as θ is slowly in k1zln3sv/r9vu.abe v26u g;hcreased. 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 f8/wer/ mf7 ieinclined 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 plzg 0us)t3 fte.aced on a second plane (where friction is significant) in inclined at the same angle, it will begin to acceleg.t uez )t3s0frate 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 gravitkqfv f8 e7; )apt,3i9zujg eqcu831eqhtr p55ational 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 the x-axis is parallel to tercg19u 3aqufe ,t5 i7 5;qhqz83)pt8ej pk vfhe inclined surface.

  15.13: An object is being pushed at constant speed on an inclined plane. T9+8 vo byj: wuin02brlhe free body diagram of the object is sb2b0iu9 :+r8 wjvyo nlhown 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 mas: ew(48s/j qd ebvgf(ys M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface i bgqjsv(84y /:fdee (wnclined $30^{\circ}$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 plane of angle θ . W* h z j ytf:k -ndzkv;8k4tc*m0fev)d-hen released, the block d4*8 -d-kmvjtnyved ;:kz* ftfckh0z )oes 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 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 f.sq1fg *u pfk d(33s*dbu+qw qrom rest at the top of a frictionless incline. The is3g f3fu*spb (*qq+k.du wdq1nclinehas 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?