07.10: Contact forces are examples of which of the fu4wmh.i 1 hyt)+mxo8 hzndamental forces?

  99.02: Which of the following terms is NOT related conceptually -gkziz+-6gn, 7nxyheto the others?

  02.20: The graph shows the relationship between tnyz26 s4i9oy stj7n4rhe mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representa j6szt47o2iy nr94nsytion of the:

  10.15: Three blocks, laberl0tuvt(.ugq( 3*le i led A,B, and C, remain at rest on a table. The magnitude of.gi((luu0tt *3 v qler the gravitational force on 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 classroom ceiling 0mbr/ q;fe ;f4chygexly36*m by a series of strings as shown in the figureb e y/gmmfq;lxc036*hfy4;r e. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。ar+zijmd-*hen +i14g yde stationary. The mass M rests on the floor. Which one of the following choices represents the tension y-*h1 zgieid 4++ndm jin the string connecting the masses?

  14.13: Which one of the x(y2 -nvxyga9,pe.wz t fdfn /inv;11 following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring forzn e21x p y1 ;,xgnavnf9(f/iw dt.yv-ce that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a fofwh8 lnih. 45prce F is exerted at an angle of pnfi4.wh58lh $\theta$. 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 : )yu ;ux4r jklt6chv*along a rough horizontal floor at constant speed by means of a force P as shown toj tvku*lr4xc:uh; y6 ) the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which case u-jr1r d./v:zm:.ylbkj *vz gis the string most likely to break? r1jj k-b mgz*vvl.:z :urd.y/

  96.39: Assume the objects in the following diagrams have equal mass and t iynaisshg0+. jf *b82he strings holding them in place are identical. In which case would the string be most li b0 2hsn8as+.yig*i fjkely to break?

  16.10: A person wishes to accelerate-men.qqy s/; -rtt z by/2bla9 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 magni-qm9;-t//2y bsaqzbnyel r t.tude 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 timeym.gr )n7 zy 29)/a ifipb)zis-v5mln, the mass has posii/g9l-ram7 mfnp)5 y.z ))n zyisi bv2tion 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 to2kz*g0p7z,pwqb dkb( the right on a rough surface by a horizontal force of 15 N as shown, during (dzpkg0p2 ,7 qwb b*zk 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 fbiep73prt,. .6 frpyy2r pp/ zigure to the 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 box and the floor is 0.20. The box i,r7 2yy3. bpp ppp.rzef/ irt6s moving with:

  00.32: A block rests on a flat plane inclined at an angle 0p55s*p lbz k,qb3qqoof $30^{\circ}$ 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 askn9 8/*4g gzx+pexzia shown in the diagg+z*i 9 kg zxxepan/84ram 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 thetuar* cw/+7yw 5ic ir,-akuv . horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normalcu57ka /r.i,uwa vt*-ri + cwy 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 angf4 9kn ur(r)gcle 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 friction is sz 1 a6nymhdhw 65qi(, (40s5hy kluhinignificant) in inclined at the same n,4(1hqya56 0zyuh 6sw d(milh5hikn angle, 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 e.h blpdl2e87 an inclined 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 coordinate axes shown in the figure? The y-axis is perpendicular to the incline’s surface while the pe.d2blel8 7h x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an incll( w*,bc s:mayined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the appmw(albs* :,yclied 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 relationships between

  08.20: A person pushes v7u u;u8askq: a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat 8; usa kuvu:q7surface 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 massve)a-a1o uj - ryx vpda8do37+ )kv6vj misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined tdjyverdo-apokva6)j 1 a v73 uvx)-8 +hat 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 fgb;z/ bt qfsqbg.g ++/yx, /ymass 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 incline remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the y fg;bzg+ sg b/q/.t, xb+fqy/normal force from the table on the incline?