07.10: Contact forces are examples of which of the fundamentaljpgcg4sn yn;h g m,soe7p 0py97,30zg forces?

  99.02: Which of the following terms is NOT r fov2b.ag2 :s d77kmcyelated conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rrv7hi:wnnmjag.oxs5; ; k.l 5ubber stoppers and their resulting weight on some far-off m;l .;w7js: vrnai.5on k5xgh planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at 3ftf 7l:zh z(p .2sou )d6sclqrest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the mags6lh7q)s.(d :2 tlz fpuoc3z fnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspen2lkls aqa kh,.6tui//ded from a classroom ceiling by a series of strings as shown in the figure. Whihs 6l/uaktq2l/ik,a. ch string has the greatest tension?

  16.05: In the figure shown, the o+ +vumrf1oe.7ue)oemfd db qjj3(/d tfd//-mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which oned+f-/3d ufo7teod )j d+ub(rm1e//fom v qje. of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associwm .oozwb9;2un 6:f6sw1z l xc qb:0gvated with the following statement: “For small displacements of an objosnq.wo6w :bwg;1x fm:06b9uzlv2cz ect 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 of 2j qc g0bhh6pums8y0;y0hqmhgu 8b0 2pc s6;j$\theta$. 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 bogc- yf 7n59hzul 9o gtlx7xcg8p ar**ij8u 5e7x along a rough horizontal floor at constant speed by means of a forceu8gi*958t lcp 7a7f7y x xj5ucgze9r*hnglo- 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. yk/e- o 1b pj-7(qxnop In which case is the string most likely to break-pq7/( b xn-y1pok joe?

  96.39: Assume the objects inmff:3mpo ;4sg the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likefof s:34 mpgm;ly to break?

  16.10: A person wishes t3qz:xz q pob a+xv;(2ml fttaw:)no:)o accelerate 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 oa: +ftxb(o ltq3x avq )on)z zpw::;2mbject. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass m tq4 .6.lg:,c ql(vbcxw6disu oves along the x-axis, at one instant of time, the mass has position 2.0 m,lsib u. c.gq: 6wl,4 (qxdt6cv 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 t4+zxfly 85 1)ab vg+wmrkmmv 6o the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the rig4y6zvlmb8 r5v xf+mwa1)+gm kht 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 thur3jc xb;9d *re right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the buxr39crjd*b; ox and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inw;pr5 -un(ih hclined 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 horizontal steel plate as shos tkk)m)/u ,9v)6mh ,8py,boelk ukdwwn in the diagram A.)k,)km lt),svwe,96y k/hmu8 uokb pd
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 l5y79 e wwfl.vthat makes the angle θ with the horizontal. The block remainw7v9y efl w.5ls at rest as θ is 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 plane inclined at an a*/ed9 6vrop:pw osy/r ngle 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 secmqe,l22 kh, qcond plane (where friction is significant) in inclined at the same angle, it will begin to accelhmqcl,22qek , erate 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 igndssz pi wy/e 1w/(k3:ax (v2nclined plane has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following x/(w sew(sia2pv/nd:y g13 zkgives 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 atiw9x h y g2rldpa5;+o) 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 normdigay;ro9+ph 52) xwlal force with the surface 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 o, f8d oix r1o4wovy,9of 5.0 m/s straigho d vor9xw1,8oyo,f4 it 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 misplaced on an ix6wev)zd/b42 wnc 0dp2 u9ktanclined 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 stati 22czwa4 0u9x/tbnd)pk v e6wdc 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 fgl3 zt8ll1 4f:e3jvv of mass M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The inclinlj81:z tv 4lffl3g e3ve 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?