07.10: Contact forces are examples of which of dzy3./8b ybbt n 40neef+z;cqthe fundamental forces?

  99.02: Which of the following terms is NOT related con02 n-bc3a8kfj ixypzvcn0whgn , :/u. ceptually to the others?

  02.20: The graph shows the rel;3keawq 8o l.zs0. f2 mvnu2uwationship between the mass of a number of rubber stoppers and their resulting weight znl2qvs0 kaw3m.2.ue ;wo f 8uon some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain6b9x/xm zs(o c at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from blocb(m x/ 9soxzc6k B?

  14.04: Three equal masses are suspended from a classroom ceilinu /8txqxvojh; v*e4 86adko a:trz*7ig by a series of strings as shown in the figure. Which string has h voae /q okad* ;6r88jivxz:7xu 4t*tthe greatest tension?

  16.05: In the figure shown, t 7,frr j; akng(z4-ttghe 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 connect,k7;tnj(ggrr zf-4ating the masses?

  14.13: Which one of the folit -:fhg ap scs2yf6,4lowing scientists is most associated with the following statemct46 s 2 gh-:fsiyp,faent: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a fg- y;fz5)g(pq pz:u 4hvnaw(uorce F is exerted at an angle of wa4: yu;h-ngqzzuppvf5 (( ) g$\theta$. 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 dkr0m;9tb,c)juobh2 wuvt454 id wv*a rough horizontal floor at constant speed by means of a force P as shown to the right h )d dwrwb,ui;tb9*5c4 v 024jokumvt. Which of the following must be true?

  99.08: A weight can be hung i35fwk mbm,sxd5( ,f ovn any of the following four ways. In which case xmfdo( mk,fb5v,3 s5wis the string most likely to break?

  96.39: Assume the objects in the following diagr;5xivz ,bc4a eams have equal mass and the strings holding them in place are identical. In which case wouzvae4 b;,i c5xld the string be most likely to break?

  16.10: A person wishes tokb xq2m6za jh /0 /cxlhn-u/;k accelerate an object upward uniformly. Which one of the followiaj0;/mcnxlhhqkb -2xu / kz/6ng 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 time, the mas n cyi1xi flaquh4-gr9;qt7 1(s has position 2.0 m, velocity 3.0 m/s,and arintc7h (u- 1l1qi a 4q9fgx;ycceleration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushed to them,) la0rn0pi4d0.9xvx v rhx2f n; dnf right on a rough surface by a horizontal force of 15 N as shown, during .9 nrnf d0m) avd4rv ipx2xl,00x;hnfthe 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 ingbt 63 yb5)s;f6ue cko 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 and the floor is 0.20. The box is y etb;3sg) 5obckuf66moving with:

  00.32: A block rests on a flat plane in eji5ilr3kwbg6i2z r0:i n+ /vclined 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 horinb1h k,qi,oy5zontal steel plate as shown in the ,byoqh ik,n51diagram 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 horizontal.vatjg1ol5o2)xqr ol3 sqf1;jn+ 3 h7k The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional forcetqk5 s1+lhnoq j23 rol1jf3 )xv oag;7 of the incline on the block

  01.11: A 5 kg block restsalb;bs ) ).1a mjck6eb 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 placep xm.tbo5x z/nh;.pt,d on a second 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 op ;t /botxn5p.zhm.x,f friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of,a n l,jc rwnd/j40)td 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 fig jn,4nd)rw,lt0a/cj dure? 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 bekqt8i9 *tef2qing pushed at constant speed on an inclined plane. The free body diagram of th2*e tkqtifq 98e 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 between

  08.20: A person pushes a block of mass M=6.0 kg with a constant swen 0 .i0n rz/o1,ozuppeed of 5.0 m/s stoz,o1 e0r0.wi zunn/p raight 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 k cdh7bt me)4fm5s4c- 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. 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, oc kh m4eb)4t- c57dfmsf the block?

  17.40: A small object of mass M is released from rest at the t5 1r xumqllf8f0.u9h eop of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at re9qh.f uurlml0f x5 81eston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?