07.10: Contact forces are examples of which /y b2wh b:,w5aurlp tek69k:p of the fundamental forces?

  99.02: Which of the following terms is NOT relt)x+ 2dcc2 qniated conceptually to the others?

  02.20: The graph shows the relati3mlim x;0u+r ry*i/ (n ,bnkqxonship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The sl/i nlqnikmy ,r xmbu r;*3x0+(ope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magni)1 fe,0famqzap z;r f,tude of the gravitational force on each block is indicated on the f, z)mf zrf,q0eaa1f ;pigure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended a :rly2haa .,0ct.b)x8bd e ckfrom a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest t ba8c,.lhk ra:cd) xty2. ea0bension?

  16.05: In the figure shown, thehlr9w n38zw0q/6u nzm pty s-8 mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which owzt rl38 m y/6 uns-zqnw09ph8ne of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists i :gxpesh5n7v)a esoqr 08.a df:n of76s most associated with the following statement: “For small disxsh5:e) nns7goff 67a a8e0vo qrdp.:placements 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 force F is e,msu.hh 3r e1m* 8spc-uhj9huxerted at an angle of 8hu39mh jc.-,m1hp e husrs*u$\theta$. 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 -zs*i;j g yp7ptm-qp;gt. ts /a wooden box along a rough horizontal floor at constant speed by means of a force P as shown tp- ;tp;-ztimjg/ g tss.q7yp *o the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which c+2aww) hq2 uakase is the string most likely to break2akh a+u wq2)w?

  96.39: Assume the objects in the following diagrams 3fu6dnpol h x, ;**hwsh:2cwxhave equal mass and the strings holding the n*d xxs3*6h lu;cp,hfw: w2ohm in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerateo;4j ,h2fzkdwn37k j x an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person onjdk;3n fx zw okj4h7,2to 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 ,4rblfod bj3nh2m q)2one instant of time, the mass has p2nb2l3qodjh) ,f4m rbosition 2.0 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 pushed to the right on a rough surface by a horiihii eu6g 1j v97h5aq2zontal force of 15 i56vgqj719haui2 i ehN as shown, 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 isn.1laj/uei , ua 7vs:z sliding to the right along the fljnvu.s7liz 1 /eaua,:oor. 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 rests on a flat hr0+i -zxj6m xplane 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 pla0+,84ekabz ppfx +b bste as shown in the diagram A+kbe 0zasb8pb4, xfp+ .
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 8;5vvc7hqus kr l i-1zmakes 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 7- u51rqz8ikvv; ch lsforce of the incline on the block

  01.11: A 5 kg block rest cy 03uvuwuis);t g8v*s 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 pla h ykg.rlxufop1 6 h9k486jsg(bdd8 3fced on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelera3hb8uf xro6 ygk89dk(p4dlj61 hf. sgte 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 gravb;n3sj*w0(i ca zoi m9itational 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 perpendicular to the incline’s surface while 3mj(az ci*09wo bsin; the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed oso 2+x1b tgbs1n an inclined plane. The free body diagram of the object is shown with the grxb2s + tos1b1gavitational 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 blo0g cb36a n4xcwck of mass M=6.0 kg with a constant speed of 5.0 m/s 6bgxa 3w04ccn 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 blobtto-)tu/3ubrx a 9(y6s,;ao+ar ox rck of mass misplaced 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 the force of static friction acting on the block has a magnitude of 38 N. The coefficient of static friction between -y/r9aas(tu rb xttr 6o +; xuao3,ob)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 friction ,v)hh8)oao m. 6 y9vfib5nlbyless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thesmall object slidebv ,vhanybyml.i)oh5896o)f s. During the slide, what is the magnitude of the normal force from the table on the incline?