07.10: Contact forces are examples of which of the fundamen im52*jh ubt4gtal forces?

  99.02: Which of the fol (aftg,q9 6zdi(v n5ailowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a nu f :z,jjfil-w/mber of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is i- ff,jw:z/lj a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest ov8e /d i3yj(tx 5j2qndn a table. The magnitude of the gravitational force on yeqt3nd( 2vx /j5i j8deach block is indicated on 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 ceil pd8.c;qco6cc/np c *ring by a series of strings as shown in thn crpq;*8/cc cd.6p coe figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m 7. iv6kqohfk2= 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 massesivo26.h 7 kqkf?

  14.13: Which one of the following9kflrkt1 u-f8 scientists is most associated with the following statement: ukf-kl9t1r f 8“For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying fb,kw* gkhm1xc3hm c5*igure, a force F is exerted at an angle of 3,c1kmx 5g cwhm h*bk*$\theta$. 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 aoxlk 2x.v84w swu40p bt constant speed by m2wvw.pxu 0x8b4lso4k eans 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 y 1mm3 n-wkpimvyy0 *(of the following four ways. In which case is theny(m 3y wv1im-* m0pyk string most likely to break?

  96.39: Assume the obj)vot h4n5x7 h/tftegn 2k)v8jects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the sgfjvh8kn2 nt)eo vxt5t)/7 h4tring be most likely to break?

  16.10: A person wishes too3h: ttng hjv3nk+3ve1 mp;n 5 accelerate an object upward uniformly. Which one 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 object. Ignore any effects of the e k pt;n3n31v:3n5gh vjmt+h oair or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instantv 40*bpe / wcvg9neiy9aem,jph 0h0 w( of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelerati*(v,ja ic90 h we0gehw9pmpvn4eyb/0 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 right on a rough surface by a ho)c9j dws xy cr.qn3m6gbgu -*,rizontal force of xc rw.qb,y*6u)jmg9c -dgs n3 15 N 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 akfg+ni2w.e) ( c)dq vin the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applac)vn)k fd ig.+2e q(wied 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 bf(tfsoexs z +f:0 /(f)zn0mzangle 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 horizont ys m),;zk 8la0vnoh)kal steel plate as shown in the diagrah8om ls;n)0k,yv) kazm 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 thy+7 s1w3dkv. *u h2qrf5lij nee horizontal. The block remain.3+urh2y v f1wei5nqsd jk7 l*s 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 rests on a flat plane inclinexm g,bpt*- 69ny yle7zd 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 significant) x8v5fy.rps+) 0s( wn 2i.ogayxf hfz6in inclined ai+ x608rfz) x s.opn2wfy a5yvs(fg.ht 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 a gravitationa wfjh5wou4(z,tl tjwb.-8 gemg 8 9vh+l 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 pg8t hl.9ofzt-5j8(mj, w+ gwwbvh 4eu erpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at co3 y zs8+bu9egdnstant 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. Which one of the following choices represents correct relationships bet+gz yb9esu d83ween

  08.20: A person pushes a block of mass M=6.0 kgi vnk d;w:zj/ +1)kx;ybck3gw with a constant speed of 5.0 m/s stra;k)1;d gybj/i+w vnc3k: xkz wight 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 bloecqa6: jmlk6 -ck 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 fricc kej6:q-am6ltion 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 ma8- zmm2e; b+y4dpafwiss M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thes z8m;ip4m2w-bey f da+mall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?