07.10: Contact forces ar:ni .r/pukm7 ua11l:ss9pu3zr y.mbc4q lgo 3e examples of which of the fundamental forces?

  99.02: Which of the ew r) 7pyv. u*9hbhqhwa6,.mdfollowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass o6.otvtelk s86yq jrlc3 l0t,,f a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a represtk3,6e r,ly v608oll .jttscq entation of the:

  10.15: Three blocks, labeled A,B, yq28x4; srinwo- 5jo yand C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on they 2 i wsrj8x;q4oon-5y figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are susp)pzh 8jy,lo:d sg a(5xended from a classroom ceiling by a series of strings as sholdg:()ox, zshp85ajy wn in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mac; pt8u -cwye2ss 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 cop-y8u; ctecw 2nnecting the masses?

  14.13: Which one of the following scie /10xz2slsjlv 6k ;mgyntists is most associated with the following st 6/xlvy;kgsj0 2z1ls matement: “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 accompasoqe/2ny/st, n+u*rd nying figure, a force F is exerted at an angle of se2n sy*n+o/dqut ,/ r$\theta$. 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 hori c3vj niy tw+lo/t1+7yzontal floor at constant speed by means of a fy +tco/ wly1vn +itj37orce P as shown to the right. Which of the following must be true?

  99.08: A weight can d 53h c(aau ngi8t)bv-be hung in any of the following four ways. In which case is the svn83gud -(at chab) 5itring most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the s, mc-a3i ,bazytrings holding them in place are identical. In which case wouy ,3 i-ma,zcabld the string be most likely to break?

  16.10: A person wishes to accelerate an obj d4t562zttpaz ect upward uniformly. Which one of the following choices must be trttp 246z5td zaue 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-a1whycz*,1mrmh1 rq 8pxis, at one instant of time, the mass has position 2.0 m, velocity 8y1c h1r1r ,hm qmz*pw3.0 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 rkn)g.7ks 0nfc j*w 8ywight on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the f0gncn kw7yks. 8j)w *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 sho:lzp 6(hwule2e2-r qfwn in 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 right. The coefficient of kinetic friction between the box and the floor is 0.20. The box is moll:6z2upf qr (e h2-weving with:

  00.32: A block rests 9(v7c xq.qw roon a flat plane 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 hv7h6y z1o3u: tb*a5rt;4xey2xjnk x i orizontal steel plate as shown in the dinhzt 23a7oxbvt i 4x ej*1k;y:6y5rxuagram 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 incfrcz6p )vbo)+tcg/ 3w line that makes the angle θ with the horizontal. The block rema vr/z)bf)wcpt6 o cg3+ins 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 resk3e3hj)m9s h lqutec p75q95ots 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 is placed on a second pe akdrtlgpzyz-4x, - ):28igplane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between pg xiy:g z)k4,re2tdp- l z8a-the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitag3t. wz pqjhx u1e2:g2tional 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 perpendicular to the incline’s suq 3ug2j gzxp21te.wh: rface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pus*7gax;mup.9 4lnjt 8lztsvn4 hed at constant 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 c.xm4;ap7 nv*l tu gt98zs4jlnorrect relationships between

  08.20: A person pushes a block of mass M=6) s4jg xe1si6d.0 kg with a constant speed of 5.0 m/s straight up a flat s4i 6)dx1gsje 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 mi;;lflnd j3gd o2a.6wz splaced 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 friction between the block and inclined plane is 0.92. Which one of the following choices best represents the mass,m, of the block?gd owadf3j;.2;6n z ll

  17.40: A small objectg8a c5gv a;b)j(3u wys of 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 vauc; 3ga8(wj g)b5 sythe magnitude of the normal force from the table on the incline?