07.10: Contact forces are examples of which81uderi09zg s of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the others86mk/k-rd srxq*wxn- ?

  02.20: The graph shows the relatko :1vv/r(k dyionship between the mass of a number of rubber stoppers and their resulting weight on yokvk :r d1v/(some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, ji a5/gqh) ju1remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the /aqi j)1 5hjgumagnitude of the contact force on block C from block B?

  14.04: Three equal masses are sui e/*dfy;fz. aes 5ktjb 3n-:bspended from a classroom ceiling by a series of str :-z5/sje.*n3dkf f ab eit;byings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M =3//pb kd gn7ihe .vwr4 14.0 k。are stationary. The mass M rests on evh 4r7g/w3 db/pi.kn 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 associated wit2+2 rcv6 77k8iyhnw.jnibrm6 zm:f.nx naa, mh the following statement: “For small displacements of an object from equilibrium, therey7nj2x.6hnam br cwni8 k,vm:6.z +mn2fir a7 is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at zky58znwxy q 8:fx4n; an angle of yz5f;xn k88zx:y n w4q$\theta$. 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 horizontal floor at c id /c.7sixipt+3l-rep 3cmb- onstant speed by means of a force P pxcidsp. / 3 cl-7ti3bm-e+rias 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. In whij:b oy;ln28ge (k-ift,ul4 nzch case is the strzntf-jeu 8bl;:kl4 gn2iy,o (ing most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the l1q)zjm-qmae) 9w ao +tt*9un strings holding them in placn)-+ 1e laoqm9uj9mtaz*q wt) e are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifu i4rlz1q+g.- ex2h dmormly. 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 forc+ mg4e.-lruqd1h2x iz e 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 timej/ia)7h nn+as,efhja2 vk;z) , the mass has pos,ks/jv;h) ezj7h faana i +n2)ition 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 .:s1,(ftm,ktfluf gw;x nq-pon a rough surface by a horizontal force of 15 N l1ft nx qg: wtf-;fkpm( ,u.,s as shown, during 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 the figure to the right is sliding to t/.2cdu(zyctv )e (darr;f, bqhe right along the floor. A horizontal force of 10.0 N is being applied to the right. The codf;e b(q/r,vyu2)(zr c ta cd.efficient 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 inclined aturwbv( x- j./asd u*xmj-7u8e 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 shownnvuvh4h19:i-:x68h w eijdhi in the di-h98hhwu ievvi :d14:h6xnj iagram 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 ab2sb(gf1 9fp gjj 4;h θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on the block 9jafpg;b 21 sj(gfbh4

  01.11: A 5 kg block rests on a flat plane inclined at an angle of 7 ,gao(1scrad $30^{\circ}$ 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 pyrpbl+l*ql3eyg w 3g0 qe+.0olane (where friction is significant) in inclined at the same angle, it will begin to accelera+y 3eq0b+*grw3oeyll. gq0lpte 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 inclined plane has a gravitational for/3q (y6hzeu6 * ptmb,aqlea:o5rip.pce 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 surface while the x-axis is parallel to the ia56tbqi,z rma* qpy/ 6p3(: leoehup. nclined surface.

  15.13: An object is being pushed at constant speed t - ;61ep6gqeazj(u 8f80d ),dwnv4cmlr pqsjon 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 represents correct relationjctrq(6 wj486-f s eegd ,n)ppld0zuq ;m18avships between

  08.20: A person pushes a block of mass M=6.0qpaqb(b8 kp j5q)5 +kbn0v )ca kg with a constant speed of 5.0 m/s straight up a flat snbqakq bjqac5( +bv) 5k8 p0)purface 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 inclined plane of angle θ . Wwlj m4 cy*j4f4hen 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 plane is 0.92. Which one of the following choices best represents the mass,m, om4c *f4yl4w jjf the block?

  17.40: A small object of mass M is released from rest ak fdc.yi5)qn 8/jgy -ot 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 slide, what is the magnitude of the normal force fromcqoyd )g /- nj5.k8yif the table on the incline?