07.10: Contact forces are examples of which of the fundamental forces?o8 k:;gh*khw z

  99.02: Which of the following terms is NOT related conceptually to the oi7hm4s7wp 4mt3b3xo y w l;hr9thers?

  02.20: The graph shows the relationship between the mass of a number of rubber tz;zl*8qmilw a dy *h23cw,2p.cjel 9stoppers and their resulting weight on some far-off planet. The slope of the graph is a rp* ahlq 8tzl9c; zci,2emw 2jwy.ld3*epresentation of the:

  10.15: Three blocks, labeled A,B, and C,* s5)m5 2bxi aujml:wbc8s bx2 remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the fiimbu clb 28 ss*2xx5:w 5baj)mgure. 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 9 4tq7pnbcy(va series of strings ptq4v7n y9 c(bas shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 kka le;gd:v:p qk1 k74o+du(i a。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represen1k g+q e(4v;l:ak audidko :7pts the tension in the string connecting the masses?

  14.13: Which one of the following siezp4 9fb(ii+ g )m0zscientists is most associated with the following statement: “For small displacements of an object from equilibrium, thzgi( + ez)fmspbi094iere is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompn9u) *zufg ol7anying figure, a force F is exerted at an angle of zog7 f *9uu)ln$\theta$. 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 rarb *vs z jqm3z9625yqough horizontal floor at constant speed by means of avj2qqz 6mra9s yz b*35 force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hu9plt +iqd)mz:m8k0c z ng in any of the following four ways. In which case is the string most l lk0 9m+ pti)cz8qz:mdikely to break?

  96.39: Assume the objects in tju3:otux/, pv5r x vqh(x7ze- he following diagrams have equal mass and the strings holding them in place are identicalj(/ruzv5 7o3 p-etxh:q,x uxv. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifq3bm; q .7h4mv4twqgldo;:v lormly. 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 force acting on the object. Ignore any effects of the air or of the Earth’srotatio7l;q.v4wv;gdt qml h4:qo3bmn.

  11.12: A 5.0 kg mass mil6g9g.pd0 u moves along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleration mgdp uil g0.96$4.0\;m/s^{2}$ . 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 arhaa1 9d7fw4t rough surface by a horizontal force of 15 N as shown, during the p97wh 41aaftdr ush, 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 toe jee-4q*-kche 0gk4q (*lv l0 sxn7qu the right along the floor. A horizontal force of 10.0 N is being applied to the rig 4 -(g4h070e-lveqeqqj *nkcs*el ku xht. 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 n)r* fxyaa8 o/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 aipy5ii 73 f/jycross a horizontal steel plate as shown in the diagram A.3 ii/y jfiy75p
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 incli4azt2 vtsv:lycmnv qm+5v ,9 7ne that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the s 9nysmz t+vvav v4q7ltm2c,:5 tatic frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat,4vdz, miby 1ey c1o1g 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 second plane7 yz k3f,hf u200wykds (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the blf, 3fyzhs007k2ykd uw ock and the second inclined plane?

  08.08: An object on an incvqvx80lkt4 k k30*a hjlined 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 perpe hj0xk*v08lk 3tkav4 qndicular 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 pla y6z/fkt x:2xih; c;bwne. 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 represe; tyxzk;x2c/i6wb:hfnts correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5zkw20b :dy1:k q v0+rr hu+k,vm v5vjd.0 m/s straight up a 5,qvvk: 2k1dvuyj zbw+vd+0mk: rh0 rflat 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 misplaced on an inclieu)fb-a q00sbx 2e 8i:jbzc2wned 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 friction acting on the block has a magnitude of 38 N. The coefficient of static friction between the block and inclined plane is 0.928 x:c b -jwe)e020sbfiauqbz2. Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released fzh5(7m 9wg; ianr;zp( b3sgdprom 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 ras(9hg;mpp ni3zdw7zg;b( 5 a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?