07.10: Contact forces are examples of which ofg 7ktjg(g( 4in the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually)pu1;fzz j:jjd/kl0c -ti6 qy to the others?

  02.20: The graph shows the relationship between the mass of a numbevry f)u)9wd 6kr of rubber stoppers and thei u)krf9) v6dywr resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a tau5a-g.n io1cn d*dxke0sk2 fts. :kr.ble. The magnitude of the .skxd nak20c nr*i:d uekg1.f.-so5t gravitational 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 sus( hkxb2fe:f*p2r cd95k)xyo wpended from a classroom ceiling by a series of strings as shown in the figure. Which string has the 2wrhdkfx k :5() *2xcfeoyp b9greatest tension?

  16.05: In the figure sho lc.+7w1 (g.p2v/bxbwebnggzwn, the mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rest pxz2gwg/vn1c( . b+gbbwe7.ls 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 associatetvmqum,9 q :i(d with the following statement: “For small displacements of an object from equilibrium, there is a r:(uiv,mm qtq9 estoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanyingiu 6(2x2l ezj3y4rwt/vyf8 fz figure, a force F is exerted at an angle of frv6x4e2yz 8yjt/(z u wlf 23i$\theta$. 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 :s ymx6 hlao ,5+ltfb-along a rough horizontal floor at constant speed by means of a force P as shoyxa:,+sh5f6 b-l ltmown 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 d, gstxmj 0 mm:z51yb2is the string most likely to breakx mytm,j szg 5d1bm:02?

  96.39: Assume the objects in the foll4h mr1 ;v lo7(b s2d*d7hjonhzowing diagrams have equal mass and the strings holding them in place are identical. In which case wd 4*mj7svhd2;lh 7zo( rn1ohbould the string be most likely to break?

  16.10: A person wishes to accelerate an object upward un*q w,wn6pt9j eiformly. 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 gravqnw,j96* epwtitational force 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, at one instaxg6 vqt 5khh8-+o/r kant of time, the mass has position 2.0 m, velocity 3.0 m/s,and ac-+/v koat6khrgq8 h5xceleration $4.0\;m/s^{2}$ . 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 (/ygxdr*//v t f7naf1a zo5peay c+ -ca rough surface by a horizontal force of 15 N as shown, during the push, the object atfdz a rg5acfn/*e/v o/p7yyca (-+1xccelerates 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 slidin (z:7(ba99rc,i zgypj5jr+ h3 xsp zxwg 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 wir:(wzc( 37p9p z5bx,y9rzx ghja+ijsth:

  00.32: A block rests on a flat j/09 pxo2kx3q:0lnmece (pm9, t alg cplane 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 fig,v2 1c k/1kuv gaan/ u/w,be7dpoet6rst pulled across a horizontal steel plate as shown in the diagrb1// oge,,u6k/uv2 a7gd1pwva knc te am 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 thhn4iif8b 1h) :cx 6 da*+iiichat makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. T 164inidfhi):+cabc8h h x*iihe magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests o 8oju4(irbunln 95u4g0jjf6 sn 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 pla7 uqb hlpb,* qt3y dl- (hpmv+ut69iz:ced on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate uy+ql uqp (dt9hl7:m* hbz, p 6vbt3-iat 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on a qxxh l7cn 7xiek62q1wk8v )d60tsg0cn inclined 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?6vd2t1) l8x ewh 6cc0i 0s7qxxgkqnk 7 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 beoy *ac2 z/i+2,.a jn,oynihqxing pushed at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the fricti ax22.iciy /y ,z oa*n,+qhjonon 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 block of mass M=6.0 kg with a constant sp1hw0-c+ke a1 woqys(u eed of 5.0 m/s straight up+e hy(10awsoqk -u 1wc 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 yjrpec) 8hd+3plane 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 j)8+hpdc er3y 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 the block?

  17.40: A small object of mat3k;x/xt c zcsb: hx-*n42qitss M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remainczit-bk xt; t24n */xx c3sqh:s 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?