07.10: Contact forces are examples of whdxq k62c0z2kbt ly9u4tr. (kfn 8h7 mvich of the fundamental forces?

  99.02: Which of the following terms is NOT related conctb ikc kuwez/8:9fd)v .epdzk3 ;qb45eptually to the others?

  02.20: The graph shows the relationship bebi*:p1g bh:actween the mass of a number of rubber stoppers and bihgbp c:1*: atheir resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labejvjn,vmnzd*h-(owbi8w8 q tz b.j;6 1 led 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 magnitude of the contact o( -w;zb* j8i bqn8jtw6vn1v,hz. jm dforce on block C from block B?

  14.04: Three equal mayd0/b974qf/j5ph xm3)r1zt kjk, m vah teje0sses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tension? mhtj zq demjh ja//by4 p37ex0r,tvk )591f0k

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are songc ::pg*wc4hpbqyec a ib4*a 6n:32tationary. The mass M rests o y4ce:c 4g nqhabo 6 :awg3pib:n*p2*cn the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of th9*z-u7buo1epp jy eh7 e following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a rpbu7 19eo pjue7-* yzhestoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerlb sgm4-n3w xn*wjw3 /ted at an angle of s3b j3n wxn4wg *lwm-/$\theta$. 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 at consta32-88qy vdtee4i6wanxnr jj /nt speed by means of a fja -ixvde8t yj628r 3enwn/4qorce P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in/o nhi0c f. r7vs53avq7m5 mge any of the following four ways. In which case is t3of 7 a5mqvc.srin g7m0/v5h ehe string most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and p u6zsk; rhr/bi3n15 ythe strings holding them in place are identical. In which case wouu/r3i n b5krp yzh61s;ld the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one of th uwqmh1a4(npdtws* 23e 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 q1p 2hwd3s(nmw*ut a4 of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along th.ag/1*j sk8( tpvza1j9l;(e pdj)zz( biistfe x-axis, at one instant of time, the mass has position 2.09a (tk(8/jtg;(dzzv.*1 ilipfs )s jj pa1zbe m, 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 pushed8o.yr*,mhc mv to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the rig ,.covh*m mry8ht 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 figure to the ris/l)e8 r*xt sfght is sliding to the right along the floor. A s *s rxf/lte8)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 rests on a flat plane inclined at an angle o/zhr*z)*c(s.n ba u 9fc-(sprxnv1xz f $30^{\circ}$ 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 horij qt: f+r5e,kta xq(1 p6zt 3,p-ubetszontal steel plate as shown in th(ep +6sterq,ufttx: - pz jatb13 k,q5e diagram 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 incmy :5.nz7y m+u 8l.pbdmyq,rvline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the inclinel.y.,8mn zbdmvm + pr57yqyu : on the block

  01.11: A 5 kg block rests on a flat plane inclined at; xtl qzy3t .jo*:m(ww8l3qs f 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 plv9*uvoys- mvrd8 7 v-laced on a second plane (where friction is significant) in inclined at the same angle, it will vrvv ld9oum*v -s 8-7ybegin 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 a p sf47.ask pm/ gtk wxou/2+p6gravitational 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 perpens kg2xp6/ /ma4+ p7 uop.fskwtdicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is beipoh a47 ngbazs qx8z c81/2:kvng pushed at constant speed 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 surfac:sb q7 1 oc8pvng4k/a2a8hxzze 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 x/wi (,d8wzh1 b x:mlqconstant speed of 5.0 m/s stra:zq x/1hb x,lmi8wd(w ight 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 misplacbur ,-ocd z-/yab2c 2ged on an inclined 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 -bygb 2uczd, -2 /arcothe 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 from rest at the top of a fricti jiudds:a7iv04v a(b.fu p++lonless incline. The inclinehas a mass M and makes an angle θ with the horizontu+usvjd:adv bp7l40f+. (iiaal. 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?