07.10: Contact forces are examples of which of thbp g y3zzs/d4,qjjk7:e7 jv5o e fundamental forces?

  99.02: Which of the following terms is ;b4s3,ea c,o6usn*)cg iflsc NOT related conceptually to the others?

  02.20: The graph shows the relatio+z,t- ;nqakpp29tp2m dsvc9ll n m7e8 nship between the mass of a number of rubber stoppers and their resulting weight on some far-o ;2 z9- k 7qpv8tnm s9ldmpnc+tl2a,epff 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 table. The wz- 3g:n),ov 92u 4umjfurgxlmagnitude of the gravitational force on each block is indicateu)fo4 xz-gw9: ,run 2muj3glvd 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 by a s,d;v :(qjs9y itpyu0 qeries of string yp0 u(,q;:jd sqvyt9is as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mc j+nh7yl1ni -mlf sbtuz(g3ja--h34ass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following j -a(lnyb7+3ium nc sl-hj341zh tfg-choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated wi4 *;0 1-1cx+zswghgnpap znj kth the following statement: “For small displacements of an object from equilibrium, thex0az1nw k+gghps;1 * jcp-n4zre is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at anzpxayox, 5in7*z:p+9s ex 8e v angle of :np*95xv,ep8+yiz xzxo e as7$\theta$. 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 , dcym- r). +jjx j1nsny,y60hkehg6 ta rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following musydm1.nc+- ,sg6kxy yhe0,nj6 )jj thr t be true?

  99.08: A weight can be hung in any of the following four way q6 or vf.owp9. f-)x;i-ya2bwtz: phis. In which case is the string most q.6x:-wpy.)2 ;i fvha izbor f-9w otplikely to break?

  96.39: Assume the objects in the following diagrams have equal mass and tp i4bdhzhz c a/n7l.6x/yej64 he strings holding them in place are identical. In which case would the string be mhdycl7/z6jeh6 p zin4 4./baxost likely to break?

  16.10: A person wishes to accelerate an object upward yy 1nzj pgs1(p sv rxl(v81,z2uniformly. Which one of the following choices must be true of the force F, provided by the person onto thrpnl8x 12gpjz1 yvzy(s1v(, s e 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-axiw y)z yr9dc :g.*8e7knpyr4ubs, at one instant of time, the mass has position 2.0 m, velocity 3.0:r9)dg ukzn4b8ywy.* yep rc7 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 a)huo0s gc1.o nc65fysurface by a horizontal force of 15 N as shown, du.oycu o6n5hfs a1c0 )gring 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 tdbj y,ot, 7i 6a ki,0pr/qqy d9ovz1,ohe figure 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 betw jqt,o79pbkzyo1 6v0i,y ,/ dqdo,riaeen the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on mqzg0kx7/81 jny faak8:8b sn 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 across a horizontal sta v3xtk0)z7 bneel plate as shown in the )nva7kz0x3 bt diagram 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 6dr/vw m0,h: zad vfp43 h1lom:y/gjnwith the horizontal. The block remains at rest as θ is slowly increased. Thehzm ,l6n14fgvpy/0mvw oh :jd/r3d :a 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 in7kt(qf,45r pn4kl w mlclined 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 fricizl) v2.infdwo-o z, ah()( /x-gq ztu*hxn(qtion is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the forceh(uw(z /(io.-h)gqa,ozn )n2fi*dtq xlvx- z of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitud7 ov 8y8j x6m9ryekvj kn5w(v0e 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-ak yy(jo06857 xk 9mnvjv8rwevxis is parallel to the inclined surface.

  15.13: An object is being pushed at constant spebx4xk)5k 6g grfq4m 8eed 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 thrbfg xq45k6gm x8 k4)ee surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block of massznohhi .-l3 3k M=6.0 kg with a constant speed of 5.0 m/s straight up a .3ionhhk - zl3flat 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 mispl p 4ywr2u/8w.oic :hedaced on 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 frictcrehp4/2o8 udw: iy w.ion 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 from resbke4,:1 nb (zvw)m b4izbli4 it at the top of a frictionless incline. The inclinehas a i4vi)b:wb k,blm 1 i z4neb4(zmass 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?