07.10: Contact forces are examples of which of the fundamental forcesa j eyk 2./ozzn6y:,yi?

  99.02: Which of the following terms is NOT related 0yfm3d u50 c*c acr(zvconceptually to the others?

  02.20: The graph shows the relationship between the mass of a numy cpq,ga17r /8m i-reqber of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of the: pi r qe-y,gqr81c a7/m

  10.15: Three blocks, labeled A,B, and C, remain giwl7:-k6 al2myoh f 4c(eym +at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What isl cy7(6+w imek2y-m oha:4fgl the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a se gg 5i 9/5g5sotcj(jhnries of strings asj 95g( gsint og/55chj shown in the figure. Which string has the greatest tension?

  16.05: In the figure wsulo2l4 j x/8v :imma:0,yckshown, the 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 followio lwc ym lu 2i,4xaks8vm:j/0:ng choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most a/,-cyrdg)jh.g w vuf3ssociated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displahr)fdvw,y.g /- gu3jccement.”?

  94.26: As shown in the accompanying figure, a force F is exerp o+dtk; eh.06w4qdtmted at an angle of dwme;d46 p+o0. htktq$\theta$. 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 pul m+oqtz3)egi 7wk,u:*b (tmy rls a wooden box along a rough horizontal floor at constant speed by means t(t euk,rmg:oyq+ib37 z m*)wof 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 case jt2/ k;n3hvz mjcp7fxasjdi-y2 k:14 is the string most likely to 3jki:a; 1f2y csknj2- mx7vd/hp jz4t break?

  96.39: Assume the objects i+mryvc6nc6. j n the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to bmc.vc r+n6 6yjreak?

  16.10: A person wishencca,rj4 ;:7 m w*asevs to accelerate 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 c wsa;4m ec:arjv7n*,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, at one instan q:rb:ltp9 2wpcy05qd t of time, the mass has position 2.0 m, velocity 3.0 m/s,and ap:q:qwp dry 9ct0b5l2cceleration $4.0\;m/s^{2}$ . 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 ro, zs(at, xwq,bugh surface by a horizontal force of 15 N as shown, during the push, the object accelera,qzwst,( a ,bxtes 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 them:ij kf hjc* :u6*pey, 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 between the box and the floor is 0.20. The box is moving :jh6u k*yi jp*ef :mc,with:

  00.32: A block rests on a flat plane inclined gsg8l+zgc9:v 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-g ;:ubujs,,i44ij y) cs8 x+t+a bvasg+ mooy a horizontal steel plate as shown in the diaso 8, +givict+ )uy s+:mjyag jbu-4;bxso,4agram 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 incline that makes2l.q zkyubc* 1;dw9f h(bd6kya r;;q q the angle θ with the horizontal. The block remains at rest as θ is syqua; .cbh9*k6l(fy ;qq wd1 k zd2;brlowly 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 inclined at an angl vmycvhuv82xo,:yyc25rtb ( (e 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 pxiz-(kirn9/ mbczumb1 d(w* 8laced on a second plane (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 bloc k* i (9unbi-bzrxw1c8mm( z/dk and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnirbr kr3a):lq46h hg x1tude 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 perpendicular to the incline’s surface while t r3rqabh4k 16)hx:glr he x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant spee67k-,h6ogho58364l fu efekk r l igord 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, thelokio46fkgruf3 5h7e6le r-o6 , 8g kh 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 kl 9,lyvo7ktk ;g with a constant speed of 5.0 m/s straight upkklv7t9 loy;, 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 oed d wn31)ys-mf 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 betw-e yw3dm ns1d)een 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 ofqelgoxd:*ik v z/ um52i6p7h* mass M is released from rest at the top of a frictionless incline. The inclinehas o 7 /6evi52*u lx*z:ipmghqkda 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 magnitude of the normal force from the table on the incline?