07.10: Contact forces are examples of which of the fundamental forc yalkom9mtd 6b+*xzp)g72 b g/es?

  99.02: Which of the following terms is NOT related cb,cta rnu7)tc/ r63b bonceptually to the others?

  02.20: The graph shows the rk*uke mx9f*x8v0wj . 3n0ciskl j3g;zelationship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is 93jix e u0*svkfcz .l0*wkm gx; jkn83a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain a l (ihoee g)sg :,un)lwbz+g2:t rest on a table. The magnitude of the gravitational(b,neog ::i+ 2gg)l) wuz eshl 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 classrz6cd. )c6my troom ceiling by a series of strings as shown in the figure. Which string has the grea. cytdrc6m 6z)test tension?

  16.05: In the figure shown, tfvb 3iz9 vr:c 23oi7nche mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass v9ci o2cibf3 v3z7nr:M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following2)p7ww pj9hy 0gj1 tnl scientists is most associated with the following statement: “For small di)j 10w9gyln7 h2pwtpjsplacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanyinzp/to+ogg38 yg figure, a force F is exerted at an angle of gy/ g3o+tz 8op$\theta$. 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 xgi1u 3 +t3 pm.hgnv5vor0*wgsl , e(chorizontal floor at constant speed by means of a force P as shown to the right. Which of the following musts(1 i m3gx.o* cwv+,n5ggve lh30trpu be true?

  99.08: A weight can be hung i+/xa15vtc,i/txe m xw n any of the following four ways. In which case is the string most lix5 i+m//ve 1txtxw,cakely to break?

  96.39: Assume the objv2c osl-v 4 cfixy.*b1ects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string4ccb 2l1 *-i.vyv fosx be most likely to break?

  16.10: A person wishes to accelerate:cpp+,ye c fq* an object upward uniformly. Which 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 objec* q:e,ccp+yfpt. 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 m irtpmsf 7:d.:ass has position 2.0 m, velocity 3.0 m/s,and acceleration s7f dip.:r:m t$4.0\;m/s^{2}$ . 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 apz.xe ;3qi f*n rough surface by a horizontal force of 15 N as shown, during the p;n fi* 3zeqx.push, 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 in the figure to the right is sliding2/sxjo7 +v0dtl j k7ki to the right along the floor. A horizontal force of 10.0 N is being/ji2jk to+svdk 70xl7 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 incz5yxm* h b,j8sr87 -de2q ;ebftvhwi)lined 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 horizrn,ju(-toa3 ay oz1q:9my lf*ontal steel plate as shown in the diaq*n19ur-:f ,o zm(jtl yaoay3gram 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 t4 q7cbi (nj.cbhe angle θ with the horizontal. The block remains at rest as θ iscqib(b74 . cjn 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 pl8d4*ls zbpjoz hmy;3rm(k e*8 ane 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 frict -, ue9a7:tan 7 poym+vl)qeqzion 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 andz- )qt,o:p ym977vlaqeun ea+ the second inclined plane?

  08.08: An object on an inclined plane t4jne7 .g0 wsez4* rdihas 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 incline’s surfaci7r4deej n*gz.40wste while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined pc29ra; ezpsh,zr6u ,clane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the applied external puss6ach,9rc2e; pzruz, h 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 mas y4wl-:x9tw)tbd z71ca z,hhts M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inc1d-,wa :tctxz h4wl )btz9h7ylined $30^{\circ}$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 inclined plane of angle θ ..k4-9w py1f ct tk9b*vhec 1jy When released, the block does not move. It is determined that the normal f -.wyt f1cp9 v4e b*k1cy9hkjtorce 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 fromnde)hg6je ),b rest at the top of 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 slhjn bg,d6e)e )ide, what is the magnitude of the normal force from the table on the incline?