07.10: Contact forces are examples of which of the jf * phj-ekl9z ymce//.p5 7kafundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the othersfvw b*3;jjcl4?

  02.20: The graph shows the relationship between the mass of a number o2vilf2w5nv/ tlfc2 e5f rubber stoppers and their resulting weight on some far-off planet. The slope of the gl5f2cvi vwt5 n2f/2leraph is a representation of the:

  10.15: Three blocks, label)pj9 jrq0 c*rx7gt(eo s.mu9 eed A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitq)(9t 9scepjmre 7jo0. grx* uude of the contact force on block C from block B?

  14.04: Three equal m o-h f2ke -griur+vqfz:;c7b/asses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tensi7u:f-/o2ihgrv fr -ekqc;+bzon?

  16.05: In the figure shown, th7pgh x3n4z+bpm 0my3n e mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mam+gz3p743xn np h0 mybss M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the follomypv ujz, 8 v2a+.m /t1y;tyoewing statement: “For small displacements of an object from equilibrium, there is a .vjttopy vue ,;y2z8/+ aymm1restoring force that is proportional to the displacement.”?

  94.26: As shown in thq(*+ p-.7cs eplrbjvwe accompanying figure, a force F is exerted at an angle of p 7(l+p-. *e bvwsqrcj$\theta$. 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 horizof+xno3z -enr/) lqa:k ntal floor at constant speed by means of a force P f-xok+ 3le:q r/n zna)as shown to the right. Which of the following must be true?

  99.08: A weight can beiwded at6 ):d y 1xmkji;nq3 na,3k6d- hung in any of the following four ways. In which case is the string most admx-e;ddktnq63dn3,6 1ii w ak: ) yjlikely to break?

  96.39: Assume the objects in the following d nerpxkzk y42c9zsp2b9616 cliagrams have equal mass and the strings holding them in place are identica1zbc626 xp 942zs l ykekrcn9pl. In which case would the string be most likely to break?

  16.10: A person wishes hg8to3vwhn;fq*;f -t to accelerate an object upward uniformly. Which one of the following n8 togfw;3q* ;h-tvhfchoices 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, thcw4)se . nw ) dg;,8cavnewo4ge mass has position 2.0 m, velocity 3.0 m/s,and acceg8)e;w a g4s,n.v dnew)ocw4 cleration $4.0\;m/s^{2}$ . 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 surf np6g*4msvv+e ace by a horizontal force of 15 N as shown, during the pus gnsv+v64m*pe h, 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 figureosuk/jxd ,w2pp 3 ndj8g:o*u 5owr3c2 to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the rigp 3:ujrdowp, /dux3 8s2*gkoocnwj2 5 ht. The coefficient 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 yret/m 7l :mk1q.6p0+y/x m qik9hyyvinclined 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 acrfgzqj kg:xu/+7 h e)an0,/ 2e7lojz seoss a horizontal steel plate as shown in the diagrg xz/)/esezh7:enul,+ of2g j k0qj7aam 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 tfg 9jejl/24 vzhe horizontal. The block remains at rest as θ is slowly increased. The magnitude j9v42lef/g jzs 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 planevp604z;z aljj 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 frict9 pp5 4pkb381nfabl,)2 mj v v-lmk7h,qlgt fvion is significant) inpnf57l b4-fv p)gml3mvb,t8p ahl9v1j,k 2qk 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 inclined plane?

  08.08: An object on an inclined plane has nwt i(/yzdp9:a gravitational force of magnitude N 10 acting on it from the Earth. Which of the followi:/9n(dtpyiwz ng 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 the inclined surface.

  15.13: An object is being pushed at constant s8e :x66uaeay duzu4+ zpeed on an inclined plane. 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:6ze6+4exuyua8 z dau surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block of phy5hp5e *7e*gc -,sc3yifgdmass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclinesiyych pd-7e,g5e*hc* p3g 5fd $30^{\circ}$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 dyy0r 837e/p9k :+wllkrz9bg; xh)d)nbraljof 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 whdbn eyjy8rb+k )9:p/hrk3 ;079az)lgr l x dlwile 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 releasedwn/-;j+ owxtlc6k/ dk from rest at the top of a frictionless incline. The inclinehas a mass M and makeso6 ;tkcxlwwdk+jn /-/ 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?