07.10: Contact forces are examples of which of the fundamental fouc(c/efyj mh.r (((rkrces?

  99.02: Which of the followaj*ry/w lz.l. ing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubbe(rpy4cuu nm.+r stoppers and their resulting weight on some far-off planet. The slope of tur(4nc. mpyu +he graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remaint.ptoxtx14juv;ma ko0 3+ zl5 at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of+54zx;lx01vup.m t o3tj tao k the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom cv0l 21bmod 7jneiling by a series of strings as shown in the figure. Which string has v1lj0nd m 2ob7the greatest tension?

  16.05: In the figure s(r:emlz+c wadm s b:6(hown, the mass 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 l( b+6sawrme(dz: m c:connecting the masses?

  14.13: Which one of the following scientists is mos *th-de2lkg8et associated with the following statement: “For small displacemenet*2l 8 dkgh-ets of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angrw(tw6m okvt 71an 1m(le of (1amw7omwk( rt6 t1 nv$\theta$. 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 bo ujep5ifkx 7*vg+m l76x along a rough horizontal floor at constant speed by me5jgu+7f76ie k *pxlvm ans of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hu.* 6u onlov -v8imjrmk5-urg4ng in any of the following four ways. In which case is the ujol6 mmu 85-o- gk* 4rnr.ivvstring most likely to break?

  96.39: Assume the objects in the following diagrams js/e )dz; sk+ zrn*zf0have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break? +d*/ zj 0kzs)ensz ;rf

  16.10: A person wishes to accelerate an object upward uniformly*t)r9lgyh6v; 4a2wm vc4 dq cb. Which one of the follo m4gc)a4rt9vl;* b6vqc ywd 2hwing 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 Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the masro(-pl61sqxw + +y6sd eh2hly s has position 2.0 m, velocity 3.0 m/s,and acceleration 6+xsqw l r1-2y d(hey h+p6los$4.0\;m/s^{2}$ . 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 ,qi kumzjlmy83n 1*h h nn62)za rough surface by a horizontal force of 15 N as shown, during the push, the 2 hki, )lzmmy8z*nn3u h16nq j 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 figurekz 0fiv83 sq)g :6phyt to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. q:3)f8h6 izgtv0yps k 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 i2t dnkmn 6 i8n.etwl)nf (w/cu- *(zwjnclined 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 steel plate as shown iucoy.wz3l,2cigjnzp9b qn 1+/ 9 iw6qn t1qw,w i g6qybj3in /pc2ln9 9zuz+. oche 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 angle θ with the horizontaab9u:, 9xf.lbixf*po l. The block remains at rest.p 9f 9x,a*xbo:bfilu 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 rests on a flat planek vj1 eygfbe3+8fue+e wgk*+ -sq9sqb*zg*f. 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 j4au2t pfh6rv :( hij/plane (where friction is significant) in inclined at the same a ( 6 rtv4jhf2jua:hip/ngle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on 5m*kw:p dmq, qan inclined 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 shown in the figure? The y-axis is perpendicular to the inclinqm :w5dmk,qp* e’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 v, r6ybdov./5 u7z0nxss(hut 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 inclydxn,7t5hv z.o (vu 0u sr/b6sine 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 speqzu5vw +0udo1 6vd g3frm2e ;hed of 5.0 m/s straight up a f1er w3hz+2d ufvq5d0 ov;gum6 lat 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 misplaced on an inclyu a-7p 82:tessmlpe)ined plane of angle θ . When released, the block does not move. It is determined that the normal foresy )p 8p:-slmt72ueace 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 of a fvip q9/z, bhiv0g5w1fr h- 1ulu/ljp9rictionless incline. The inclinehas a mass M and makpzgjh /fu 95h 1ib,-iq0wu v9rlp/1vles 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?