07.10: Contact forces are examples of which of the fundamental fo5ah1ci.8,uiv;c y pbm rces?

  99.02: Which of the following terms is NOT relfcvpyx0 w g 5o;tk8b 3b58-yxeated conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number ofk ry8oxwn+:-lz4n3npo/kb ::gp /hhh rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a relrgho/ w/bhnxz8 3 n:ok:-nkh+yp 4p:presentation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. T9z;0 t.uvbl mahe magnitude of the gravitational force on each block is indicated on the figurbzuv9 l m0;t.ae. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masshu n0sm.ju 07lu( m9uses are suspended from a classroom ceiling by a series of strings as showu07.nhlu0jmum(s su 9 n in the figure. Which string has the greatest tension?

  16.05: In the figure shown, t7s /dwe1 tm3es6dmuqhih( *n,8e /rwdhe 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 mu1es e dd,8 r3s(q/7te 6hdnw/m*hiwmasses?

  14.13: Which one of th93a.wach; g-wbh )pwme following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional h.w- 9amwaw hp)g;b3cto the displacement.”?

  94.26: As shown in the accompanying figurlru: qj-*k6 knwql(k7e, a force F is exerted at an angle of ju(k*6:lqnk l7rqw-k $\theta$. 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 w*0qt5cy s /pqhqc94/luhr9p-kyn7 y at constant speed by means of a force P as shown to the right. Which of the fo - kp/5ylp 9qq/9 ychuwyhcs7 0*qtrn4llowing must be true?

  99.08: A weight can be hung in any of the following four ways. 8 yc r*y;;:zk9blxu ve In which case is the string most likelrycz;x k9lv:u* e; b8yy to break?

  96.39: Assume the objects in the following diagrams have d )qohpo ;ve ux7i4mp+. c+eg5equal mass and the strings holding them in place are identical..e4) 5ev dm+pucohxio g +;7pq In which case would the string be most likely to break?

  16.10: A person wishes to ach ,6)iaedow* -)ulkz lcelerate an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person ua),*-kl)hozl6 edw ionto 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 time,kb 3n;16tf u3q2 qodpd the mass has position 2.0 m, b;onpuqqfd2 d 3631kt 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 pushed to the 4vcc* d)-5zw bmvt1am right on a rough surface by a horizontal force of 15 N as shown, durin)m*m vtc bwd 451v-aczg 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 bon.w rqj4vml .p-+. lfxx shown in the figure to the right is sliding to the right alo p4q- .llj f.rnm.vx+wng 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 with:

  00.32: A block restst go94r lunx w2zhcwlf3wx ds 0-2-5j7 on a flat plane 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 acros kqk pd37+4uljs a horizontal steel plate as shown in the diagramk+qp7j dl 3uk4 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 with the horiz(ee(rx+me ( oqc0e*6lnkpm,ry5dx a2ontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline +2 (epx me(a6qm eo(lx0r5* ekcrdny, on the block

  01.11: A 5 kg block restshaq(yxv77 mhwlwn* cz , h)m nxjnf-b/13oy5* on a flat 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 second plane (where friction is signp q-r abs:h; qf2u/7m1uco qe0ificant) 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 a7 qspu qca/;:h 2efm 0rbuq-o1nd the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitu6hcc+n- p wr3jde 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 inclin6cr + 3hjncw-pe’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined plaeqp/9 jbsps6nuj5y*0() yf, ek ible7ne. 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 choices represents correct relationships bety7)/ssyn, 9lqpje pek6b0 i(5f*jubeween

  08.20: A person pushes a blocd1.yfg mvp8,hk of mass M=6.0 kg with a constant speed of 5.0 m/s 8.dmgp ,f1vyhstraight 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 plane of0sw pmno h b+o)6xj55g angle θ . When released, the block does not mo +s5ojnhpg5xom) bw 06ve. 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 mx;ctelsazg 6x .wu xt,)ju 575ass M is released from rest at the top of a frictionless incjcxzs g ue. wt5xa) 5;7tulx,6line. 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?