07.10: Contact forces are examples of whic(mxt:bn716+ij fwn jgmm2e ) gsrh37eh of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to tuzf aw4 8(ichbjn8a8ev -.e 8hhe others?

  02.20: The graph shows the relationship between the mass of a num.scg1s6cpl x5o/)bkcly8 yq (ber of rubber stoppers and their resulting weight (p q6cloccy5k1 xy 8 sblg/)s.on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,mq4 smmu- etkl9)p tj8q1yt.*;zu hk (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 k )u1.qt(le*k8 thm;mpqtu msjz-y4 9of the contact force on block C from block B?

  14.04: Three equal ma;qtwfg-rg l; ;gnmj5nz+f 3m ,sses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has thz 3tr +; gm;f5nwj m-n,lgfqg;e greatest tension?

  16.05: In the figure sh *j)jlk+r2lgw o9,dat ;mg+m m*n gu4zown, the 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 masses?g)r kguw+**tomz, a4 2mg +jlmj;nd9l

  14.13: Which one of the following scientists is most associated b6*tf4we8ypiv97 qwzwith the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displac 6 i*yqwp8fwv47 te9bzement.”?

  94.26: As shown in the81t;t e 8ewni4y mp-rm knh x(,/oy1pf accompanying figure, a force F is exerted at an angle of me fr 8 -oei /(n,4pn1;1 p8xtymhtkyw$\theta$. 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 woo:u:bed jt.bt: den box along a rough horizontal floor at constant speed by mejud .bt: t::beans of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four e u(6+tnf:s ; deap5meways. In which case is the string most p:tme6d n aeesu5 (f;+likely to break?

  96.39: Assume the objects in the following diagrams cvl i tsct ;+mwy.buva34,g13have equal mass and the strings holding them in place are identical. In which case would the string b 14c+u lg,vvyb ;cw33t. stimae most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which on)lihtjd;)/ v ie 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 objectijv )hdit;/ )l. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along +tx jlyrjc 7m)8v;)dlthe x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelerati;) dl7v+jxlm8 tyjr)c on $4.0\;m/s^{2}$ . 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+bc5tdaqv hjz 3lr(11(sb 4tq right on a rough surface by a horizontal force of 15 N as shown, 3l(ascj1qd 4hvq(brbt 5t1+z 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 figure to the right is slidingto/7g2jpw lqn8k xi;- 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 0px w/ n7tkl-oq2i;8gj.20. The box is moving with:

  00.32: A block rests on r5)7lnwnj8x, p s o.9vgugcd)+ z9p hdqb89waa 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 across a horizontal steel plate as shown in 8+ou+gm-ep+hk8ugm6 z +jd fbrfwk), the diagram A.8d6+uj -ggf)w+ ph ruomb+zkmf,+8 ek
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 ;71f-g0und h:pdyjph n:pu yyq , by+5with the horizontal. j- ypy, h bh y7;pu0d:gnq: 15fnudyp+The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block restsm8pja*cm e (5j;ibh3w 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 sik 2t7:lu hjk 8jxrci(m- z*)hiexd0*egnificant) in inclined at the same angle, it will begin2 -clzj(78xh 0 kdu mte:)jkhixe r*i* 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 gravitational force of magnitu ph ,dt,k b /:w,efqs)*q2zuipde N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordinate axes showqh,/q,p*su:zd 2 )it kwe,pb fn 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 bervr.91nz csll;qa;- uing 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 surface by n. Wl;qc.1;9n zl ruasrv- hich one of the following choices represents correct relationships between

  08.20: A person pushes a bl4 gdu;4n9 2okfgf vzy+ock of mass M=6.0 kg with a constant speed of 5.0 m/s+o 2fy;4zn du49 gvgkf straight 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 planea 0ke p871w0ezcud rw1 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 blocku 800wad11epze 7ck rw 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 ) p s5h1w sqxd8y,.wuhyph/n9mass M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angl nsuyhps8y9hd/w,)pq 51h.wx e 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?