07.10: Contact forces are examples of which of the fundamental forcelkvgl1j bb8lw*;d4/ypp q mqg,h:b 3i*+m 7r cs?

  99.02: Which of the fole9 u2ft.sq zz/ztq8ny 2q( 8vtlowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the m*)bap 8 jqezr8 9xvq5cass of a number of rubber stoppers and thei p8q 8q)a9 ejzc*bx5rvr resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The9vfst;eh6x zpxn;h v ,-h +dr0 magnitude of the grav0+n fr;thvxx6s9hd;v p,h e-zitational force on each 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 ar6fogvw )g o18ww3uho-e suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has tuvoo f168hg wow w)g-3he greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14 ok3 wq:;tp,ns.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the striwot;:,s 3qnkpng connecting the masses?

  14.13: Which one of the following scientists is most associated w v(akl1*:6pef uv.o kgs i,od(ith the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional vgak*(vdoe. o 6f(1 kl p:,iusto the displacement.”?

  94.26: As shown in the accompanying figure, kf q7iu.7 eoyf3.c6k 9655umiagw1t1whwec wa force F is exerted at an angle of f36.ygw e 6o9u5th w1ci5wf .i7 qa7kewm1uk c$\theta$. 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 horizonta d*ljv8u9gd6o l floor at constant speed by means of a force P as shown to the right. Which of tl9 gd 8*6vdojuhe following must be true?

  99.08: A weight can be hung in any of the follow7 rlt6 u-o.tfhpt03g 6-qowal:kx5oning four ways. In which case is the string most likely tn lo3 a xlp75w66tfh- otu .g:oq-krt0o break?

  96.39: Assume the objects in the follo0yk,j z un;yygw du*30.e6vq;ha6kxcwing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likw n*k;xhc , 6vayze .uyygd6j300ku;q ely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which ow h.c42 9kjm5/wrzyb vne 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 air or of thej4./92 kw5yw chzmrbv Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at o+-lo k7 kcwpr3:j.f cshor 31xne instant of time, the mass has position 2.0 m, velocity 3.0 m: psc fw13ol rhj+x-3 .kk7roc/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 objec m jbcjo: 61zuf1g3x7y7yjf r)t is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the :yy 6cu13rf 7jjgjxo m )zbf17object 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 th (c8a-sqc4ppoi xt 6:te right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kine4ipx-s 68:(oc ttcaqptic 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 ay-zne3 u.i-z rn 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 ac)-ok( m+y dk/ 1m5eqt vb:zvfeross a horizontal steel plate as shown in the dk 1t(db+eyvmfq/kv : ) 5mo-eziagram 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 withm elt4u5*khi ( the horizontal. The block remains at rest as θ 5*uhte li( 4mkis 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 in4-mv,f0.r fz .gdqnvjc.nk)s clined 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 p/+b c(-ohn iimb + ee7pn2qx;placed on a second plane (where friction is significant) in inclined at the same angle, it will beg+xe;coqnh/ +b(me bn 7ii2p-pin 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 pf 0ib2 9la93zc lboi(hlane has a gravitational 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 perpl9(azolb fh03icb 29i endicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at const rdoh,/ +*ol65no roghant 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 ren lo *drg oh5r/,o6+holationships between

  08.20: A person pushes a block grd.pkyff 2m *67ws, pof mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclinefryf*g6ksw 2 pmp.,7dd $30^{\circ}$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 misplace b;nb8e06dnbid 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 frinnb0b;86de i bction 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 o+czi s2q:evvspa/( h .f a frictionless incpz/qsi: ha+v2 vesc(.line. The inclinehas a mass M and makes an angle 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?