07.10: Contact forces ara53mr1f a zd5je examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually totc6aequh 4dm6yg aby7 v:,7 z7 the others?

  02.20: The graph shows the relationship between tzi)y-a; z,/8 mj pfceto+:byr* 2 agwhhe mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of they 2a-+ow:tj;/eb8g mhzfz r),apy ci*:

  10.15: Three blocks, labeled A,B, / r)kvy nj;ob /wbb:7pand C, remain at rest on a table. The magnitude of the gravitational force )n; b/ vbrj ywkbp/o:7on 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 classmcxx 0a/.k :q6 ksm7rwroom ceiling by a series of strings as shown in the wm6a:0km/srkc.x 7 xq figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0s3 o:8ngb;q dp k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the followibdpg :o n38;sqng choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with thejzbj:4 wn6 cpfm1*b p,1tqj-o following statement: “For small displacements of an object from equilibrium, there is a rest-jf6j b4 jmp1oz 1p,*bqn cwt:oring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exertedupaz8w :waqsih.iwgc ;).b m+dn//w) at an angle of a))id/w wm;/wg..za8bwc uq hs+ipn: $\theta$. 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 alo vmtw6m; 3za;x2rxvf: ng a rough horizontal floor at constant spx3m;6mft;z: x2 varvweed by 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. 5n :ptkd4r49gvyidz8.f zwt8 In which case is the 48zk9ytpz v tdd8nfw54:.g ristring most likely to break?

  96.39: Assume the objects in the following diagrams rl :t hl:06vrehave equal mass and the strings holding them in place are identical. In which case would the string be most likely to break? r tr:lvhl0:e6

  16.10: A person wishes to accelerate an object jofxx:-1 mfm3a urr 35upward uniformly. Which one of the following choices must be true of the force F, provided by the person ont1x5ju:xrfo- m 3r3amfo 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 ona4czt;m 75tu*r+skv2q bc f.ie instant of time, the mass has posi5r4* t.z ;a2imt7q +cuvb cksftion 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 tl 50tmo(5gg9e6cs fgshe right on a rough surface by a horizontal force of 15 N as shown, duri c0f5em5sl(sggg 6t9ong the 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 thegos0zzzniq3 (-ij:2 :hq;prd figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. Tiz r sq30i:z g2 ;ohq-pdzn(:jhe 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 fl;ytv0 0 jcdt*wat 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 p(dpy+u xu /muu;p:s8first pulled across a horizontal steel plate as shown in the diagram Apdx up:my(/sp uu; u8+.
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 anglg5 l b;d,g-q;lcgr+hj e θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes g; bc-j gl,q+lr5;hdgof the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests0 y6q* i+qphh*cof* ws on a flat 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 placj6rq6lrke y hks 6:c8awi03z.ed on 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 seihr0kq666y e. :k8r 3 wzcaljscond inclined plane?

  08.08: An object on an inclined plane has a gravitational force of m. )ob+6zaridragnitude N 10 acting on it from the Earth. Which azb 6+i.) rrodof 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 surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed 3vps. k2ezg/cwiv9g0on 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 with the surfacep.ciw g 3z2k0gv /e9vs 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 speed of 5.0 m/k:m q (2 rl 14yrk-dfg1wrpy1cs straig1k1gy c f4d-lqkrm2( :p1rwry ht up a 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 mispl2lg e/n( /myzm l:v8hsaced 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 menv/h : (l/mz2gy l8sof 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 frictpiva nt)jc*a 2-59yjjionless 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 slide, what is the magnitude of the normal force from the ta)vj 9ji aa jn5*p2-tycble on the incline?