07.10: Contact forces are examples of which of the fundamental forb/4bb,5mc /g wafc r-wces?

  99.02: Which of the following terms is NOT related conceptually to theldn3e de4 bl33 others?

  02.20: The graph shows the relationship between the mass o;/y z.8wo 6km3bqw vyzf a number of rubber stoppe;/yz m68v wbo. y3kzqwrs and their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labfy/1 fyu kblc-s1h)/ jeled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block fy 1yb1k-fj/l)s h/ucis 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 clasdqzqhj q +q-y-5sy3v4sroom ceiling by a series of strings as shown in the figure. Which string has the greatest tensi3jz5 +y v4dy--qh qsqqon?

  16.05: In the figure shown, the mass m =40 bvly -sa, rw4jyx(o 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 the tensw,x -o rb y4y04vslj(aion in the string connecting the masses?

  14.13: Which one of the following scientists is0wkmwc+gf-/( wjn leb7tzs4 0 most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”? s gzw0bckw-/f l emn+7j(wt04

  94.26: As shown in the accompanying figure, a force F is exerted at an anglc i kwwea3)3/:)dyf5i br r0uoe of )e)0w abro 3k: i/if3rdy5wu c$\theta$. 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 rough horizontal floob9+ ydux uku4(r at constant speed by means of a force P as sho+u xuykud b49(wn to the right. Which of the following must be true?

  99.08: A weight can be hung in any ws)jdm4hd5 z7of the following four ways. In which case is the string most likely to breds mwd54z7h)jak?

  96.39: Assume the objects in .lj b a:0i4t /o 7i)xx-yjziuuthe following diagrams have equal mass and the strings holding them in place are identical. In which case woxl.u:ot7-iui40zj a/jybx i )uld the string be most likely to break?

  16.10: A person wishes to g ou0k)dyav0:.u*gp.n8t q irl -y/umaccelerate an object upward uniformly. 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 thegum0:* oku -g/ l0.ipr ytq. 8uadvny) Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the mas*mu qn33u5 vxls has position 2.0 m, veloci3unu5xlq3vm *ty 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 i(0a.nrkgjc1fg +1yqj s pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right gck 1rg.+na j0f(qjy 1at 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 showsr)6g lg42 o 9.igaioan in the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is 6a)29rg 4oiglg.isa o 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 pie:kqk49f2;i2 w 1cptuq0el xlane 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 horizont;e+1myek; 7ydmwlgtpog h;s9sv0 4*y al steel plate as shown in the di+eg0hlps ;*mk1oe7yvt 9 w4;yds ;mgy agram 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 my.cc+hi k7-x incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly cym. cx7h+ik- increased. The 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 incline5uraq562,r-d m7iurta3 saipd 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 s7u,n-18wne ydbczv thd vr1/( (k)ey mb-i3i necond plane (where friction is significant) in inclin7)my- uk d-hv8w 3v1 (ybrnteb n1z/ce( iind,ed at the same angle, it will begin to 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 pl -ifyi1bw p9d:ane 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 y9i1pfiw db :-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 spe/wshoni8 48pf;/ymc elzf) x 7ed 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 4;p8n)8mzh7 /yl/xfoc ew isfforce 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 with a constant speek-l c)g,:;*pc v cn0yzyam6 aj*7gwkfd of 5.0 m/s straight upmcca-k )v*yg cp k6 ,yf*n: g7zjlw0a; a flat 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 inclined plane of angle θ . m yfq)o18/cguta77yz b8j2 (mvz dbz5 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 may a)/b c128b7dq(z8mztj ouyfm v75gzss,m, of the block?

  17.40: A small object of mass M is released from resdw 98r6espp2 pt 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 thesmall object slides. During the slide, what is the magnitu s 8re29wppdp6de of the normal force from the table on the incline?