07.10: Contact forces afkgj )ja3ox m*z-/9(ew1 v ms8rkb.ware examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the others?-o.rn ll:-c wb

  02.20: The graph shows the relationship between the mass of a nu1t 0*v*+s g(dhq0 wezaz)sz qzmber of rubber stoppers and their resulting weight on some far-off planet. s)tzh0q*eq*0z( 1+zz avw sd gThe slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magnituhjx38n*zb6 t lde of the gravitational force j8 h*tzb l6nx3on 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 are suspended from a classroom ceiling by a serie+dha4x5 /rq)o ukae y*s of st4a 5 auyhdx/*q e+o)krrings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the w6-ts+m ja +vlmass 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 connmjsl+ wtva- 6+ecting the masses?

  14.13: Which one of the following scientist5nx -(,af4er)pn mbw4)zt wyh*:uji ps is most associated with the following statement: “For small(tr)u 4a phyn4iep 5*w-z )wmf :njb,x displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying fuc6t124p xkps5ium1l w )6gm nigure, a force F is exerted at an angle of m uutm26l4) iscngx11 wpk5p6 $\theta$. 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 at constan m ir/0vo5;p uf1fz(rgt speed by means of a force P as shownv ofu/p; 1(gmrz05rfi to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the foll4 ki;; g7t6r .feh3ewqu8v fhgowing four ways. In which case is tf468fe r k.vt7u;ggh3eiq;whhe string most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the2:rasx+dmn7yz;m n;5t eioev;9 qn e( stringssxn;itmz7 +2nevq9ad ;eo(r m;e y:5n holding 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,cz ybpyg(e/.ba4 xs894xu lj upward uniformly. Which one of the following choices must be trub/s9l ,czuey apjy 8xxg(.44be 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 thevx( 1go-gg:k e x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,an gvox 1g:-ekg(d 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 objd7. ie:b w xjhbu(8j7aect is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the 8e7dj b7i(wau .jbh: xpush, 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 intza; tk jo*8g2 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 iszk8jtt; *g2ao 0.20. The box is moving with:

  00.32: A block rests on a fl zmq8v /jb93yvat 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 acrlh9xkw,zeo r:a; k:3 xoss a horizontal steel plate as shown in thez;9,h:rwklx a :x 3oke diagram 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 angle0.,rddys : h*alowrp ) θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on thwod.r,:0 pylr*s da) he block

  01.11: A 5 kg block rests on a flatezrcz52 3ahay 6 u)h7g 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 plane+/ sxeeltwihl bg7nw5-2ki ;2 (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 the block and tn2eh5wsigll kie wt +-x; 2b7/he second inclined plane?

  08.08: An object on an inclined plane a8o59bd tt zvzi4.y qra*0 8sna:iioqh :cf57has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct componentscih7 oaoq8:n5 diairzq t by*z048v5.a9t f:s of this gravitational 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 bein3helmpa ilne*a udism qdl29;(*)1+m g pushed 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 form)ead*n*al mid32 l ie9(h p1lq+; musce 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 block of mass M=6.0 kg with a constant speed of 5.0 c* d(j92 yeywobd.9ya m/s straight u2c .w9aydbodjy*9( yep 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 block of mass mismzpf k8hb +2pteyj34-placed on an inclined plane of angle θ . When released, the block doe+-f 8jy32m pt4 bzphkes 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?

  17.40: A small object of mass M is released from rest at the top ixlhe5m8.kl8of 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, w 8ie xhl8kml5.hat is the magnitude of the normal force from the table on the incline?