07.10: Contact forces are examples of whicd 1oi-k ;t/ynpev2hjhjpz+4qt i7t -+ h of the fundamental forces?

  99.02: Which of the following terms is NOT related c)gi; :w5fuq chonceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of )yy2hb+kp 0efa7d :t2 5ud *xfxro9eq rubber stoppers an7tbr xd :k2a9uh +yf2eyqpex0o)f5* dd their 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. The ma8x1x epy )3xp5my6g oqgnitude of the gravitatpo)e58 mqyx x36xpgy1ional 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 are suspended from a classroom ceioytg),3 iag+t3 jixb+r5xx, r ling by a series of strings as shown in the figure. Which strij g,3+iiyr atbxx+)ro,x3g t5ng has the greatest tension?

  16.05: In the figure sh bno6(xforltu0(/u+v4-zo t zown, the mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on(u 64of+-0t(obvr /xlt uznoz 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 associated with the fol) xu0 sfgij3 /hvbs(h8lowing statement: “For small displacements of an object from equilibrium, there is a restoring forfh(38 jus hxsi)bg 0v/ce that is proportional to the displacement.”?

  94.26: As shown in the accompa81akir 3z h zz.(,l8qxdks;oohc d43 mnying figure, a force F is exerted at an angle of ;dx ,ks8mo8lh(z3zko.cq a 4 31rdh iz$\theta$. 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 alonh1h nkt.x3vh. g a rough horizontal floor at constant speed by means of a force P as shown to the right. Whit nvh1.3xk hh.ch of the following must be true?

  99.08: A weight can be hung in any of the folloz2 xm1 *dzpd*:h0tazswing four ways. In which case is the string most *1p0mxzs datd zh2:z* likely to break?

  96.39: Assume the objects in the following diagra v+ zy yulyo40trqp7,2-nw2kjms have equal mass and the strings holdiul2k w,jv270 r+zy4-poqntyyng 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 uniformly. Wsj1h 2e;j lbr p*6-n7bxtt5pnhich one 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 the Eartt ln*-th7x e6pn5bp;bj2j1sr h’srotation.

  11.12: A 5.0 kg mass moves along the x-axi 9r/qht7qn8 k;+jncvb1u(obu s, at one instant of time, the mass has positic 9(ujtbn+b u8 nh1qokqv;/ 7ron 2.0 m, velocity 3.0 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 right on a rough su1bbs fve b0;.xy(jao9rface by a horizontal force of 15 N as shown, during the push, the o.0 19es;bxab f(jvy obbject 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 m6bkb b:7uw jf:xnw7,in the figure to the right is sliding to the right along the floo :fmnbkx 7jb7, 6bw:wur. 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 moving with:

  00.32: A block rests on a flat plane inclined at oeccper uruw 8,5; (e1f qu3b.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 .4hkf /)stl+v kp;tqr+ 3kc1crqfa8gacross a horizontal steel plate as shown in the diagram A. ;plt1ck/ cr+ qrh .)3qfk v tkgsfa4+8
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 inclinee6td u*b 3 g-bot9g3jd that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of tgduj 3d-beb9*g6t3o 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 inclin yph9y:dgexz; 6)2fo0 yoc.zo.n3 t czed 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*wn)n.9 voy5:flq mtm a second plane (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 the set*)q w5o9mn. :vmlyfncond inclined plane?

  08.08: An object on an inclw;x0z*5:wimxy )tkbf whea41pg2f 5hined plane 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 shogxy45 0t1w;p :a2bwwmf) z he h5ikfx*wn 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 planb,(nw6jm i7s:y on4jf e. 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 tyn6sn (bo7mf w,4j:jio 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 z /di,he (u)ce px9;qswith a constant speed of 5.0 m/s straight up a )pd q z;sc( u9xe/,heiflat 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 mn-rnlt 70.kb0k 7aaux56 nzh r)k k;jsass misplaced 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 bjkkskz0 )70 bnr.tnl7 x;k5h6ura- nalock 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 theubizxz; 66o 96kd:o vq top of a frictionless incline. The inclinehas ai;k:6zq9dbz oux6ov 6 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?