07.10: Contact forces are examples of which of the fundamental for974yreg0d ;t*qi xzz wces?

  99.02: Which of the following terms is NOT rela2; wyh,uqpsg) ted conceptually to the others?

  02.20: The graph shows the relationship between the mrh3 gcs0jhv6/ ass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of thev6j0s rghh/c3 graph is a representation of the:

  10.15: Three blocks, ltb() /xiv7j59 sl zxtlabeled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicatelxxt9 s5lbz t( j)iv/7d 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 cx4g++4z e vo7n .bbdgxeiling by a series of string d.ggxbb74 xv+zoe4n+s as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the gy3kn)no a1g sm+6qo 3mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension anok3+)yq6mgn o3 1gs in the string connecting the masses?

  14.13: Which one of the following sk8j-tpr . h-8qhq f0mrcientists is most associated with the following statement: “For small displacements of an object from equilibrium, there isqrt8hpq-j 0r8hfk .-m a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted ud;pdo4a :imq* : ee*yat an angle of :d;du4eym e*:p*o aqi$\theta$. 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 floomen 1 2ke7qsqx4 sgc,t4 q7io +b*fdy6r at constant speed by means of a force P as shown to the right. Which of the following mustd7s bqgxe7f4m y1+i6te4*ncqs2q ko, be true?

  99.08: A weight can be hung in any of the following four ways. In wjwzgb3il:jea lkd(/f0 rn: uw dk9251hich case is the string most likelnwfba1i ze k:5jdr23k9/(lg ujd0 :wly to break?

  96.39: Assume the objects in the follo4r; k n+7x3e8 7mdd8uvxtxi.:j bkaebwing diagrams have equal mass and the strings holding them in place are identical. In which case would 4b ;t7b8x uj8miek n3dr:xa7kx.vd +e the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one of n a7wyblxxnzc /)a7a, (lpl()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 Ean)apxa(al c(b,7n l lxy/ 7wz)rth’srotation.

  11.12: A 5.0 kg mass moves along thoaqa 4h p6 6,hgy;9wef81k)gygd*dv oe x-axis, at one instant of time, the mass has position 2.0 m, velocityogk98a*ghd,awp6 d6ho 4 vg q;)eyf 1y 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 roumwj0 08nj td5qj5 9czagh surface by a horizontal force of 15 N as shown, during the push, the om0tzj 0 jq55n8acjw9dbject 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 the right is slc uo1.bpx ;8lvb xe:zl py(-z3iding to the right along the floor. A horizontal force of 10.0 N is being applied to the righty bz(.uo3elpzlv-xx ;:1b8pc. 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 incli6iniey,/) zyvmq5q r)9o*yh;kug cl2 ned 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 horizonta c;cx pair5d(9l steel plate as shown in the diag;pi a( c5rxc9dram 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 aeb ugqxor 0)v9 rw6:*kn incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magror)k g*u:eb0 xvq9w6nitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a fl(4y8ss.h7v t,zj )0be mdf ryhat 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 (where friction is signh 2cmi j2vi- 1o/jy2a.l1 v xf,;qcinyificant) 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 seco-fhy / c2;xylaq1 2ionv1i2c,v mijj.nd inclined plane?

  08.08: An object on an inclined pland39q 4kyf96mv l( 0le*n kmvw( -jmoate has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct comml(mt e6wk94 vaj( qd 9-v*m yfo3ln0kponents 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 being pushed at constant speed on an inclined plane. The frt/ jd8q-j1gma v u/,:)tl)tz-ntalw men ;/vdee 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 byvt z)uqga/ n vm-jwt)1ld,ml8/:/ed;t tnaj- 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 b 6zwt(ei3v-voo )-lnwith a constant speed of 5.0 m/s straight up a flat surfaceoviwb z 6)nlt -(o3v-e 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 mamnmowq 5 +hmw,(b50 asss 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 whilemahob5ws 5mqw+ 0n,(m 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 of a frpo4-u5e2 1 pbl6stxv uictionless incline. The inclinehas a mass M and makes an angle l5 o64uvuspb-e1x t2pθ 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?