07.10: Contact forces are examples of which of the fundameno0 xt,ch/vhqb7 h (hd0wqu6z,s wv.o4tal forces?

  99.02: Which of the following terms is NOT related conceptually to thn5lh0ncme6xj i)cl9 /yo-:lt x/busp,ggi 3.e others?

  02.20: The graph shows the relations brw4q5:qwe-)qdc 2f9g 0set vhip between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation o:f0er9cqt) q- wdg25b4qew s vf the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magnq +i2vv *snd0vitude of the gravitational force on each block is indicated os*+nvv2 i0dqvn the figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceilinjb01dxem7 1, m(ovk ffg by a series of strings as xomd1j(1 7kmv feb,f0 shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the+o bt-o y0n(bh 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 fo bho(n0t-b+y ollowing choices represents the tension in the string connecting the masses?

  14.13: Which one of the following sm1hk wj-;1p lie4d;9p b0ztymcientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to tip14;jh9pb ey1mkl mw0dzt;- he displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an ip:o*p78tr cx angle of *op8:i t r7cpx$\theta$. 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 horqu gi9- xlq aka /8qr487 qkk9jon+ht9izontal floor at constant speed by means of a force P as shown to the right. Which of the following mu9h 9lriqnao q/ kt74xgkj+ uq9-88qakst be true?

  99.08: A weight can be hung in any of the following f;mqqh. jba n(3our ways. In which case is the string most likely to 3b (.mnq qjh;abreak?

  96.39: Assume the objects in the following d70/g -xndzlfc oo t8b6iagrams have equal mass and the strings holding them in place are identical. In which case would thedo8xc7nz-oflbg 0t 6/ string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which,z rf/5 8dss7hxlcg b1,px7mb6jx nq( one of the following choices must be true of the force F, provided by the person onto the obje7 ,6j 5xxsg7,pm bndqszflr(b 1h/8cxct? 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 mass 7* icj 2q)v,pktju0 mphas position 2.0 iq, ju 07jp k2tmv*pc)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 rotd+g 7h9eyqjs35s3j v ugh surface by a horizontal force of 15 N as ej s95+ghtsqjy3v d73shown, 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 ikpiw i)y z0+i1n 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 rkii wzy1i)+p 0ight. 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 a6-;quy3 )sdbnktmxup5x p -( mn 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 am; -is,cmx- gw/jnro(cross a horizontal steel plate as shown in the diagr( gwxjnm,os/ir m-; c-am 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 ih,a4hry:p h v 2ot7i5makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes :io45vh2y hp, ari7 thof the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block jn6+zaoi*2qyf .fmf+rests 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 iswyi ppw6krx :/g;4jz n ih;oj..x,7vi placed on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/k/z hr wji v ;i. .xg4pj,oyixpn6;w7: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 magnitude N 175-cba nwnzjed3x 7(b0 acting on it from the Earth. Which of the following gives the correct components of this gravitationa(-e7bzn5d cxbw j3 na7l 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 qy/ (:zjoo 2dnconstant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represeq(oy o d2/z:njnted 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=8 y 9o ,w87rgcshqz.hc6.0 kg with a constant speed of 5.0 m/s s7ow.qg,8c8rc zhy9 hstraight 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 plane of ant*fpnb0 u4n ax:s 3oos( g*.xagle θ . When released, the block does not move. It is determined that the normal force acting from the incline on the bl( n ssb0*aog.utxx 3af: *4npoock 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, of the block?

  17.40: A small object of mass M is released from rest at the top 1xj,x ml9yk;o of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston 9xxjy;l,o1km a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?