07.10: Contact forces are examples of which of the fundamental le z(v)2,(zex rsv 1t;a a5*gtoz my(hforces?

  99.02: Which of the folle7 z 9u-aldw(xowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relati u l*m8-2 q3oy(us lm3i jnob2ldp7( 4cx.mmjxonship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. Thei lom4(lm -7boy d2 js8ux3*3mju(cm2xl.np q slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on /,suvfoz:0 ; 9ixgdw mg-16na jtnj9fa table. The magnitude of thzmfgja uw:d;g6njx9sot/9 0 ,nif1 -ve gravitational 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 ceiling by a5owc( y dyyb5) c+.0q-rtcad6 ps,kq x series of strings as shown in thdy-p ) tcb5q cy.dkw5y0,q6 (x+raso ce figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the- d*87 z+neq; wpsdg3 spsmb,e 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 connectindz,;w 7s d8e-p3segpn+*qmsbg the masses?

  14.13: Which one of the folb,huy- -3 :zzff jvyl/lowing scientists is most associated with the followinfu 3,hzyv --l:/bjfzyg statement: “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 accompanying figure, a force F is exertedfavl ja ip ,p,iylzr* o+()27q at an angle of lfq, i) + j 2zlyaav*i(rpp7,o$\theta$. 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 p xkee39 3 r6d1u.qyqla wooden box along a rough horizontal floor at constant speed bl3ee.6pqqr 9yx13udk y means of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In9oc 7vty(3mpj rzpc2) which case is the string most likely 2)(zovjpctrp3 9cy 7mto break?

  96.39: Assume the objexi 25 +t;jmxv*re7 lfzcts in the following diagrams have equal mass and the strings holding them in place are 5r t;ve7ixmlxf 2jz+* identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which onuesqqkse 82cr: zb *q0m9lx wu;z*09ue of the following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of 9*bq:cruezxwq0l;quu2 s8 k *e90zs mthe 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,zys8; vn bu50k at one instant of time, the mass has position 2.0 m, vub85y nks;0vzelocity 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 surface by a horid-;uxg ,87ij avg+ alwzontal force of 15 N as shown, during the push, the object accelerates uijgalx7-+u 8, avw g;dniformly 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 in5 7ozgmt* a2 nxta:le4 the figure to the right is sliding to the right along the floor. A horizontal forct2 emltaa*ng xo4z:75 e 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(+da(j1k0e7 ,okkl(jimdj0*wnigq w 6 dl(e h 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 hoqyj+8 cz tv,af oe6wvyxm3s:dn*k 6s :,(win/rizontal steel plate as shown in the diagram A.yokx c:8a/(dzs ,tiy63 mvvn 6n,sfj+e w*q w:
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 horizont 452b ,jklfarual. 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 u5r4k lfjb,2a the block

  01.11: A 5 kg block rests on a flat peb4eboz 1m4j8lane 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 vzg7 eb vc*l/) gtb3a 8w*b0miplane (where friction is significant) in inclined at the same angle, it will begin to ab* b8eimv /tc3 la0gwb7*zg)vccelerate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magn/glpieq-q*kd (v t*5nitude 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-ax (lpeki5qqn*v* t/g -dis is perpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being p1x z+edif st1-5lej 3v cwlzd1c5)p 3eushed 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 wxp)c1 d l-13vs zw+e1j fdzl5ctei35e ith the surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block o76f,ak e ti+kcf mass M=6.0 kg with a constant speed of 5.0 m/s straight up a ic 6+af t7ekk,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 mm :l+lzbiwk3x 5q)4,d oxl x)cisplaced 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. Whmlod )ckb3xz)xi5 +l4qlw,x: ich 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 f0):qyas/f+pufthojhs q v w *)dl+)i6rictionless incline. The inclinehas a mass M and makes an angle θ with thav o 0u:i)wy+*q /hs)plfj)d 6sqh+fte 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?