07.10: Contact forces are examples of which of the fundamental / de0qy bl, mq4fr/2ggforces?

  99.02: Which of the following terms is NOT relatee e..hkf3nd 7i ;yi+kfd conceptually to the others?

  02.20: The graph shows the relationship between the maruetq7xnb3iudph 3y* 3y7r: 4 ss of a number of rubber stoppers and their resulting weight on somtbnx r7y7p ey4iduh3u:3 q* r3e far-off 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 mag;nne otz ,, iam 00sgg*e-0rsynitude of the gravitational force on each block is indicated on the figure. What is the magnitude of s0s,0ri ,e;a*0 tz-ngmgne yothe contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling byzp ;vb6-fja50 2l llfzv3wk(q a series of strings as shown in the figure. Which string has the greatef vzw 6(l f-lp;vz0a3bjl5kq2 st tension?

  16.05: In the figure shown, t4x/me( b3bul6pbyb 4 vhe mass 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 choices represents 4b/(eb 3p6b4v ymu lbxthe tension in the string connecting the masses?

  14.13: Which one of the following scientists is most assoi qdy*m3p r b8e-ym:2c69 rgxyciated with the following statement: “For small displacements of an object from equilibrium, theq m:6b2r ye 3-idpxc8*gmry y9re is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figu6 :0wxwtk ne1m u.5ejh:b:hgare, a force F is exerted at an angle of t0a:hbng:jkux5e h. em6 w:w 1$\theta$. 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 rout,r w8zbs *e0lgh horizontal floor at constant speed by means of a force P as shown to the right. Which of the followiwzer 8* ,bl0stng must be true?

  99.08: A weight can be hung in any of the following four ways. bo b5 k/4l(pzc In which case is the strinb(z5ob p4ckl /g most likely to break?

  96.39: Assume the objects in the following diag4a; fksglcf:- rams have equal mass and the strings holding them in place are identical. In which case would the lfs-kfc g4a:;string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifoiae gl:3 z /r8 5vhdg;x0xqs1brmly. Which one of the following choices must be true of the force F, provided by txq3lz5;ad8b xegv0/ 1 rihs:ghe person onto the 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-axis, at8xd)(8 r gqeno one instant of time, the mass has position 2.0 m, velocity8n(dgo er q8x) 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 surfacez* sz5g 8buhoeu6kom:e9z3l* by a horizontal forlzh5 gbsk89uom:* 3*6euozezce of 15 N 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 boxoxyp +kgxg3r2z-1au (4 qfn +t shown in the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 pgxn(+t2y-1q 4xgz 3ufa+r okN is being applied 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 rests on a flat plane incmrb* 04w2j ggzu1j;mplined 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 pullm2) 1kjdb 8zhihx)y 6ned across a horizontal steel plate as shown in the diagram A. z1b28mi jhh6k)y)dxn
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 the hot -e48fl-rpor(q uxm9 rizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal forcfl-q-mprt(x8o r4u 9ee and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat p)*whi; w6r dvv6)hkh-(nldetjg )px zh1 p(5elane 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 v/-x:/vyzr be-hc u.s plane (where friction is significant) in inclined at the same angle, it will begin to u: /sv./hr-vze ybxc-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 an inclined plane has a gravitational force f-v;hy0 j,dcy of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordy0-h yjfcv;,d inate 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 at constant speed on an inclined planefveotlsm/q 6 x5op v) r/p,2b0. The free body diagram of the object is shown with the gravitational force represented by W, the fricto0r eo) svpf6v52mxpl qb/t/,ion 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 relationships between

  08.20: A person pushes a block of mass M=6.0 kg withwefy cn4 *wzt(2hz/(g /r5i yx a constant speed of 5.0 m/s straight up a flat surfacxy54yiftr n/(ez h w* wz(/2gce 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 )h;tm1 k3g,wtj*i- f k g0wvmgya3j u2on 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 the1wujw3va ig 2j -m0h) gmktt*fgk;, 3y 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 fromgp9 4td ljy p4htm3;bl4to* w5dpny20 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 l tyot3jghm52w4dtd y94l4p*;b0ppn thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?