07.10: Contact forces are examples of which w5ehd e ckgl53jbq7; 7glvp; +2+tslxof the fundamental forces?

  99.02: Which of the following terms is NOT related coj) -5;/ fg4m.2lqlfxv omdo jvnceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubber s n3vqi0ggfhgw,b/ya0-h,4q o toppers and their resulting weight on some far-off planet. The slope of the graph is a representation obq i h, nfvghw,40g/o0-gy qa3f the:

  10.15: Three blocks, labeled A,B, and C, rema g16tyj: ns+grj8/dufs e5mn i 7.9qu(- hqvcgin at rest on a table. The magnitude of the gravitational force on each block is indicasceir5g796-jj: t ggnufq.dyqv+h8/un(1sm ted 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 )knkk/uz0 5/b4ufd iueqrv,: a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest te) v/n0q, /d5uk4z rkefiu:kbu nsion?

  16.05: In the figure shown, the m,7 novf95: ihovf fds0ass 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 masseho90,f :s id7fo vfnv5s?

  14.13: Which one of the following scientists is most associated with the foll)u;yu)va *m j0 gpz-yqowing statement: “For small displacements of an object from equilibrium, there is a restoring force that is propora0zu)-v p;g yj)*quy mtional to the displacement.”?

  94.26: As shown in the accompanying figureg 9g e3qirlt6t 8u)wr5, a force F is exerted at an angle of 6qwg9)er 3tu 8rli5gt$\theta$. 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 woodenf s */c2b3y:oka/necv box along a rough horizontal floor at constant speed by means o:vofk /2c 3n/eacb*syf a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any ob / iz6aqeon/,0td,vpf the following four ways. In which case is the string most likep aiz/t,,v/ed on60b qly to break?

  96.39: Assume the objects in the following di0w(pri(*5rq1ja ucl sagrams have equal mass and the strings holding them in place are identical. Iarci*rj sl q01(5puw(n which case would the string be most likely to break?

  16.10: A person wishes tyyh xgry cx 88xe/t74 ef(4wj4o accelerate an object upward uniformly. Which one of the frh4jx4y7 (4 eft8cyxgw yx8e/ollowing 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 air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along thzamb7o9yjm5ql *(k o;-/xjo ve x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceymolk; b/ jq(-*7 5axj mzov9oleration $4.0\;m/s^{2}$ . 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 aiq;:fp;wwnmn ; 481 z*hh*ojsrlc 1sw rough surface by a horizontal force of 15 N as s s1w;*n hlqh; w1js :;nm8 4*prwfiozchown, 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 mj)o7 sn 9x:t,/0ouu :uwwt uhright is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinutmxu:h:s n 9uoo ) w/70wtuj,etic 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 *w kl3 ,bkzyd.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 i014jqm*r ngcb n the diagram Ac*4gmjr bnq0 1.
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 a1+xw6xr) fx4ke qr0crngle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudqk xr4+ 60xcfr w)x1rees 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 inclined at an angle of 4 kb mv cb+1a(d9dq8rw$30^{\circ}$ 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 sig pyibh2 :i(l0oiyzg0 z pe./*hnificant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of fricti0oizbpie*( yz02.h/ ypgi l: hon between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitationax (c .pxu 1,oxmbq3ndn4 2upf-4-bulc 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 figuq4c-.(4,mx bnudpx3bfn x2uo1lp -cu re? 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 constant speed on an incline8-xk(c+ensf y h((mpjnw ::xnd 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:pf-:8w(m+jn xck ehxn(nsy( 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=6.0 kg with a constant speed of s ap 4e9uve/i,5.0 m/s straight up a flat surface incle4ve9pus i/,a ined $30^{\circ}$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 mispfz, hdas0rhot, s;g*6ch* d:n laced on an inclined plane of angle θ . When released, the block does not move.g s6;zh,: rca0fdndt*,oh hs* 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 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 rel u fr8w6yzqb.9eased from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline rema98b6u zyrwf. qins 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?