07.10: Contact forces are ex jbto-4wnmoo9watq820 .k8 q) xj7rt , aoyww8amples of which of the fundamental forces?

  99.02: Which of the followin5dlgsr,+ o ih8g terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between tw f;q./m22 w 6ji/ p rudtjsti)vf51txhe mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the grapx ; v tdi2fpi mqttr51)/fjwuw2s6./jh is a representation of the:

  10.15: Three blocks, labefzwg4 gxq ;yl 2/pu.2mled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on bl;.p g2uflxgy4 w2 q/mzock C from block B?

  14.04: Three equal masses are suspended from a c,0 jhy qnd91yilassroom ceiling by a series of strings as shown in the figure. Which0iy 1y,njhqd 9 string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are staey (,i x3*hz3nad *baztionary. The maydnz*i3 ah,a3(z *ebx ss 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 following scientists is most assof *9-0rgtwh0,+yl vw eq9y vhpciated with the following statement: “For small displacements of an object from equilibrium, there v*,+pgv99hr ey y-0qwwfl0ht is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force czku9.fi-ne qa.3 k :gF is exerted at an angle of 3 :qez.u-ikaf 9gc n.k$\theta$. 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 3)/xmzjq9lknmogr8/1o x;i k along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be tru8kj lo)m/x1 9r;ki z/qmxo g3ne?

  99.08: A weight can be hung in any of the following four ways. In which casmob4f;do;8g u6u 2e+;qvxr /z:kll kee is the string most likely udk4m g;eou68:qlxl o2 fzre;k+b/v;to break?

  96.39: Assume the objects wnk22egh lf:s/*vf ba, 2eh, din the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to bren ,2ba:,gek*vdwfsh el2h f2/ak?

  16.10: A person wishes to accelerate an objec,0vpq pa;m1/d e i/fmvt upward uniformly. Which one of the following choices must be truemd1 fpi ,aqe /p/v;0vm 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 ma/tl vj7(+v5t qh ncab9ss has position 2.0 m, velocity 3.0 m/s,a /catj5htl9( v q+n7bvnd 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 jv y a:bg6):6mkpdmv z8tb31 athe right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uni pa3v8)b 6j6 ba:gy:vzmdk m1tformly 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 sliding to the ru*2bwex 4ym,ju /7s)frr xdw8ight along the floor. A horizontal force 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: ms/yw), rb2* uf xx87uj wed4r

  00.32: A block rests on a flat plane inclined at an nwx7*e ap .lmvk14xr.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 pi xdm9l,dp o ht7(a3si;*clfm+j5/r across a horizontal steel plate as shown in the diagrloaj 7 rit(;,p x+5i*f/ cmlmh 3ddsp9am 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 a++lzvh0 *pv uthe horizontal. The block remains at rest as θ is slowly increased. The magnitudh0 v+v*lpz+uaes 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 pl1bzfl i+p43/t ikij. oane 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 frictw cy (tan3 s.+w2huv-lion is significant) in inclined at the same angle3ua2c+s.l-yht(w vwn , 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 an inclij,2vhdszkt 3k8 js s(3m;(ywened 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 coordmjyts8 (kk3, dw3e;hz2ssj (v inate 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 sphq.ish ew6*/uh;t- fb v8vu(reed 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 with the surface by v*urhbhsi .;wv u/h 8(tqf e6-n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 )exq.h t: cwq8kg with a constant speed of 5.0 m/s straight up a fx c.h8wqe )q:tlat 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 onfqp,fcom0 z;+ jao+z / 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 plfmq az pozj;+/+0o,cfane 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 relea;fti j+d:alkver+c (/sed from rest at the top of a frictionless incline. The incline;:(r j +leitfd+/a vkchas 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 table on the incline?