07.10: Contact forces a iaptsg9:qgfb izih18 z8h4(:re examples of which of the fundamental forces?

  99.02: Which of the following terms )j83; tqaoscml d,z-qis NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a nutn2s qbc:bi: 5a )dq*bmber of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation o db:*isq tq2b5n) cb:af the:

  10.15: Three blocks, labeled A,B, and C, remai56bea.i 7e lyyracg 0.n at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force oeb 7 .5 0y6lrae.cyaign block C from block B?

  14.04: Three equal masses are suspended from a classroom ,mx xyn+sh78m ceiling by a series of strings as shown in the figure. Which string has the grx hymm,sn7 +8xeatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass huqcsd n8yq * rnf6bs-h9;h ;*M = 14.0 k。are stati8q sb6h 9sfcnnq *uhrd;hy;*-onary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated witr0. 3d.8pdwga3s v p wwv4/tzdh the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacemenwtv 0dspdvw.3zg/p8d .3wr a 4t.”?

  94.26: As shown in the accompanying figure, a force F zl:)le1q w2dzl d5p f*is exerted at an angle of wfpze):ddl z l q152*l$\theta$. 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 rougg gt2 l8 3xv;rtcy3:(n1pd ngxh horizontal floor at constant src gnlxd;2(3 8g1 pn3x vytt:gpeed by means of a force P as shown to 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 c b)arn xd)5n4fase is the string most likely toxr)f5)a 4d nnb break?

  96.39: Assume the objec2.)f /.)zpyih,hloh i*xuzigts in the following diagrams have equal mass and the strings holding them in place are identical. In which case) y/izh hu. o2)i.,l xih*gpfz would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one igvfx,ai x6e5 c ci 1nhm--5x1of the following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of the gravitational f5cxh,g- ni1xi mfx65 ic-e1v aorce 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, w:* 1up4uip wumhrr5 5at one instant of time, the mass has position 2.0 m, velocity r* u uu1pihm w54p5w:r3.0 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 rigvpa7v- eil 69ixnz f(29txyr4ht on a rough surface by a horizontal force of 15 N as shown, during the push, the object acceler2nza fl vxp74-(v 9iyri6 x9etates 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 tvf/*ok+5qto cbj9 b6lhe right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. 9tql+/voj b6c5 o f*kbThe coefficient of kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on qanogin0t*) k c 7a37ia 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 srj 476oaiuuu:,dy,cis first pulled across a horizontal steel plate as shown in the diagram jusu i:, c64o yud,ar7A.
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 incli4io8c.hgd ish//m 8hi ne 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 static frictional force of the incline on the ci/4si d ihh8/8g.homblock

  01.11: A 5 kg block rests on a fla5. mx+oyyd-du t 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 plane (where lk -k7-lv ,zkzty f+i/friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s.l,v/7tlk-+fk k yzz- i 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:* f/u:voazn skt ..r z+*wkpu force of magnitude N 10 acting on k+* z:uat*.vr.o pu nk:/zwfs 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-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an incling x6 h/k956xoowf 6wyjed 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 inclinw9 hxkxgoj5 w 66/6oyfe 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 pushekpdnkpu5nf)szp ts 2x57x5nl6 -- * ois a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclip u)nik oz5np-5 ks5f*t6xd-2plnxs 7ned $30^{\circ}$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 w oal6:y-sku* fqdd5n/x1 bi.of mass misplaced 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 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 chf1* -bds/uwdxlnaykq .o65i:oices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of ywzpo/ kyk /yfe,; b)*a frictionless incline. The inclinehas a mass M and makes an ay*e/kky zyof p ,)/;bwngle 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?