07.10: Contact forces are examples of xi b (kx ac1lxh**5wt+which of the fundamental forces?

  99.02: Which of the following terms is NOT related * xjy7az/ pv0qconceptually to the others?

  02.20: The graph shows the relationship between the mass ogs;hcu3zq30*d. k 6o ljvqqd:y m8(buf a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a represenq;(vku u zd3os*:cy3jgqh q0b l. dm68tation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rembwg if8f 7xe 7iv9(h/st on a table. The magnitude of the gravitational me8bf7wfhxg/ 9 7 iiv(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 classroqub3n ayz/3s 2 ah-q03t3ri(z+sbmtg om ceiling by a series of strings as shown in the figure. Which string has this3gzm+ t(bs-qyb/atna 32 03 3zrqhue greatest tension?

  16.05: In the figure shown, the mass m =fis z-q831 cgyp g87rz7kkvo: 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the folpk-c7qv7sf38:rg y1 k zgi 8zolowing choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientis jrqybnb; jnhs0s,v:o *2w 80xts is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to thshw,: vnjqb*yosn jb80 0;x2re displacement.”?

  94.26: As shown in the accompanyingikbu- 9x:p9 yq figure, a force F is exerted at an angle of 99xqiuk -b:py$\theta$. 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 rougc5an gcnyek .t,1tn -a pi-czhb5 446ih horizontal floor at constant speed by means of a force P as shown to the ri5-cae -ikt4yt, bnnnhzpacg1 . i65c4ght. Which of the following must be true?

  99.08: A weight can be hung in any of the fols+rd an2 v4msp5tuvbf.-35r p lowing four ways. In which case is the string most likely to bf53+tpdsu-banvpr 4 s. 5 v2mrreak?

  96.39: Assume the objects in the following db/f +sp ;, po (h4wxol8qvrfr7iagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely pxq8+ 7f 4fh(;rv ,/op bslworto break?

  16.10: A person wishes to accelerate an object upward uniformly. Which on7 25c zowev0n):wfyn me 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 object. Ignore any effects of the air or of the Earth’srotatio:2 yzenw cf7 wo)mn50vn.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the ma4gnr3,5kyj gs ss has position 2.0 mgr3y5ks4nj g, , 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 g 6md*cacgpyb3 5/z7e*zul d;the right on a rough surface by a horizontal ;63 dccg*ud5pm *bg/ ya7zezl force 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 box shown ik xnn20s5fgz v4n(u( kn the 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 bv2gf5 (s k4(n0nxukznetween the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inc6:zlnva x2 zf( fwe/ws5pceoer/14t9lined 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 pulle:p y5-/w- 8rh oqdbjopi0 djw,d across a horizontal steel plate as shown in the diagram A. yrbj p,qwpwdj o-d8/5h-:oi0
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 inc.9-buw,b)crhj ikzb-bn- g . yline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitu ujb- b-i9w, r )ygnzcb.-kb.hdes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block resk0 jo2k:53z a20aeeq6 cwfktyts on a flat plane 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 secom qg- o3idg:.lpmoj3d w( g67rnd plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the go.6im7wm :gqj3 d(lrg3od- pforce of friction between the block and the second inclined plane?

  08.08: An object on an inclined )v2rgkluv:g66jboa;f k+ld8 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 a2)vjv b6lk+r g:gd6;f loku8 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 inc(x .wg osjj7fu7.ck.b lined plane. The free body diagram of the object is shown with the gravitational foc .sbkxu wfj .7.g(o7jrce 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 relationships between

  08.20: A person pushes a blnsz+ u c(3itfcu.pqc1m9 6j) :2oa zaqock of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface incn ju 6 :.1 )i9z3aomca2quz(+cs fpcqtlined $30^{\circ}$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 .s9)okpi7 j7 ep 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 static friction between the block and inclined plane is 0.92. Which one of the following choices best represents the mass,m, of tkj7se ip )p9o7he block?

  17.40: A small object of mass M is released from rest at the top of)0ook -v 0zqc0 qaks3yhb0.jj a frictionless incline. The inclinehas a mass M0ob.0k0qczvj3qaoh) kyj s -0 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?