07.10: Contact forces are examples of which of the fundamental fo gngsgl9fm 9)8x j7-marces?

  99.02: Which of the following terms z)u :fsyuqa52fc51e p1yi:qi rd-/ gm is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the masse(m./z b( rathl w sxg5:4s6li7zsnf: of a number of rubber stoppers and their resulting weight on some far-o hae6.(x7 w:ms(g 5sibzf:zr/stl 4lnff planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a 4cvmlx() hbr 3o ;ue y4pvsd1,table. The magnitude of the gravitational force on each block is indicated on the figure. bcxrl4d yvo p3ms1ve(u;4, )hWhat is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a cl 9fp33kby() udrdcod x p 0tbgja6l7c),+ gu6passroom ceiling by a series of strings as shown in the figure. Which string h 9d3pcgod 0jybxp6g+ r3au(lcd)t) 6k buf7,pas the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。ag ct d55jond*(nd 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 connecting the masses? 5n d(5cdt*jgo

  14.13: Which one of the following sm)p /pbsw 9 r0-avjkk3cientists is most associated with the following statement: “For small displacements ov/s903kbw)k rp- mj paf 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 angle wh6/xu + /vzp5)e 7gut(5p 6q+rfagu z9epnhkof vg +phq/ )5n u9hue wf(e/xk rp7u5apg+ 6zt6z$\theta$. 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 horizon 0 +u lt5wu,glp6r8distal floor at constant speed by means of a force P as shown to the right. Which of the following musd+ist gl 6u,u rw85l0pt be true?

  99.08: A weight can be hung m.9j3f: gt 1:fpvttzm in any of the following four ways. In which case is the string most likelyjtm:vmgfp91ztt:. 3 f to break?

  96.39: Assume the objects in the following dia o, x ahhhl2yqs5gb nq8z(c*/.47c irfgrams have equal mass and the strings holding them in place are identical. In which case would the st78(./lh rg5cqos h*fcnaz, i 42xqbhyring be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one o/qxtbtcex17 /f 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 obe xt17qtc// bxject. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass6-yjbl mr z56/cw(vrh moves along the x-axis, at one instant of time, the mass has porhzm6(vb /rlj- w5 6cysition 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 the right on a rough st,ey84dn8 jmyc j we-5urface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the r,4e5-8yc 8mj tdnwjye ight 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 rig eg8awb/1-b hfht along the floor. A horizontal force of 10.0 N is being hw gbe/1-b8afapplied 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 rests1z8 77n+vhsdf/f5 g6v jb keps on 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 1faai kb4h8- zacross a horizontal steel plate as shown in the di1ib8-zk 4fhaaagram 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 restsbrpymh9kj398m-/bl/4g/ xxt r5 u h lr on an incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the/9jbph5l-l48ku9t mb3h rxr/ xy/m g r normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat planeagiyrm 1 25pui+lz ej6o 2p*:j 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 planec-/ :lrfx.kpa (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 second ikl p.:caxrf -/nclined plane?

  08.08: An object on an inclined plane hiar; ): mr m.aas)7+gdvx/nf;/ hqxwhas a gravitational force of magnitude N 10 acting on it from the Earth. Which of the foln;)) hs;qi+wxdm7rr:mx/g va f/.haa lowing 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 pus s1+4cb hec8r0uj, i8wbzxdk:hed 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 with the surface by n. Which one of the following choices +hbe wz x r:ij8b0ckdcu18, 4srepresents correct relationships between

  08.20: A person pushes a block of mas7v+8 3r() 3o tq axyoxce.t-sc h.oc*qzs3g lrs M=6.0 kg with a constant speed of 5.0 m/s e l *oqv3sx.oc3r+3-xz )rs7(ct.tqgo8 a cyhstraight 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(vaa vd 4zh/+j mass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined (4 dajvh+v z/athat 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. Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released frqzi75+nj k8 a1rojim52 :auvdom rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The izj 8 uvi75: kano+qji152a rdmncline 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?