07.10: Contact forces are examples of whipcg8b6gv *6 xtch of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the ot 8 uux2r5p f)71e m-moveo8nc0rpyy2lhers?

  02.20: The graph shows the relationship between the mass of a number of ru.0 f1;cymbwcy8sg , hq.a,lmmbber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of th al.m; c,wgyhbf0 qmy ,81mcs.e:

  10.15: Three blocks,1e) t yp+x9syc pb0x 0c-,wsln labeled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each bt+e-9p0ccsx1p 0lyy ,sxw b)nlock 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 ceill9mgg t0v: ue s;sz:/ring by a series of strings as shown in the figure. Which string has the greatest tensgm9 /t:es0gz;s ruv:lion?

  16.05: In the figure shown, the x,o w6s9f6bcs60)zo5,f odzphpwr )u mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The z9p)0wos, b6d5 r,ws6)fzo6 xhfc puomass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most as 9hz)pfynat k54azf.3sociated with the following statement: “For small displacements of an object from equilibri3kf )z 9fp. zayna5h4tum, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted a) v76zn d .zlh7jtx0rgt an angle of hl7nd.jtzv6)g0r7 x z$\theta$. 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 horizontvivv5yna,c9q, 7snx 9/+g d9lp 6franal floor at constant speed by means of a force P as shown to the right. Which of the following munyv7,f 5+lgq dx sv6n9aa9r/9n ci vp,st be true?

  99.08: A weight can be hung in any of the following four wapm6(aoc q);h0 p1e lzyid(xu7 ys. In which case is the string most likely qpy(xz61) ao li(pd ; eu07cmhto break?

  96.39: Assume the objects in the following diagrams have equal mass and lq uahp- :yz6(the strings hol( hau:q6pylz -ding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniforml a 1(yz.ndn(r dw8ffl0y. Which one of the following choic.y zn nfrfald1(d(w 08es 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 the x-axis, at one instant of time, the masmmszu,9- .evzw m2sl8s has position 2.0 m, velocity 3.0 m/sl mm 29se -w,zv8s.umz,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 ho0x0uauq )dcbvl1);d8y 2 km)tpua c(w rizontal force op 0uk8ly u dxb1qcd;)u)(a c wv)2a0tmf 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 in the f/smk/(jo1g f j9vgje0r0msnp8c b6*uigure to the 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 kinetic friction between the box and the floor is mvg8 pjs*0fknro06es1j9gbmjc // (u 0.20. The box is moving with:

  00.32: A block rests on a flat plaupypbqt 57x/pts).pt2m 6ec: ne 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 tmv2f so iy h,*(yu,/ibqd; -(dbxx4 xsteel plate as shown in the diagram x-dh,4ys(of;i(x i*vbm2b tqu/yd,x 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 jj wnvb-n; /:d θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictiona nj:-bvd /jw;nl force of the incline on the block

  01.11: A 5 kg block rests on a flat pla8x0xg.z7pb j yne 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 placed on a52tuhtv 9lx*m(nl sy1 second plane (where friction is significant) in inclined at the same angle, it will begin to acceler(uvtm9n l2ylhst5x*1 ate 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 plan ctcs 5m+nis)ga05o ;0 j5bowge has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravtciw s g)oc;s+0m555aonbj g0itational 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 constant speed on an inclined plane. Tt o;i;b v*s1 hex. hb/uh+eiw6he free body diagram of the object is shown with the gravitational fiu+ x1sth ve bie6;* h/hw;.boorce 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 blocm9,og1 d*hg jv3tty)vk of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat sghjt 9 *1o,dv ty3mg)vurface 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 angmp9 ol e7c r+a9r ).wnaid:z7lle 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 9 lo.ai7:+ nz7drp9cwelmra )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 i:s0eznx0 ar0of mass 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 thesmall object slides. During the slide, what is the magnitz0 0nra 0xse:iude of the normal force from the table on the incline?