07.10: Contact forces are examples of which of the fundamentk3k jv 9o6f rw0)rqiptkb( )z5al forces?

  99.02: Which of the following terms is NOT relatedrc(4 u w,*b eramq:yx/up6bh8 conceptually to the others?

  02.20: The graph shows the relationship f*j-4kx3jp fh between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a represent4xfj-hfj p 3*kation of the:

  10.15: Three blocks, labeled A,Bh*b 81 kkbk6h ab8rm9 f*qah.p, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the6pbq hh .hr* kbk1km *fab9a88 magnitude of the contact force on block C from block B?

  14.04: Three equal maspzw1.b l9 5ra3dxr(s2 aoutq( ses are suspended from a classroom ceiling by a series of stria9x3a1 w bto(l rd(2.qpzr5 sungs as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass 4ss6u yr7wpjv6b a6t sx0v+4p M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices repreu 0 7ajyb6t4r+ ws4vv6s6 psxpsents the tension in the string connecting the masses?

  14.13: Which one of the following scientists iswo.uw 6l0bjgmo2( ie7 most associated with the following statement:(j7wu o eg6i02mow .lb “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is ex hcf)z vto* - ea:hmzw8z.3fv7erted at an angle of h7ft zw.f mz e:3zv8*-a)cohv$\theta$. 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 i) o-m qnq (rx3ca qf-k+ k1y9ddry,3ofloor at constant speed by means of a force P as shown to the rightqqy3k+k,odyxn o-ra mrq1(39 )cd -if. Which of the following must be true?

  99.08: A weight can be hung i/j :j9hmfe7xsn any of the following four ways. In which case i: s/7em fj9jxhs the string most likely to break?

  96.39: Assume the objects in the following diagri) l o/neqg*;cpr ouo)iekx+ *34(dkw ams have equal mass and the strings holding them in place are identical. In whipixo* d*) wi/cog+uekl;k4rq )(e3noch case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniflzr xg bpg cj5h*9h,6:ormly. 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 f 6* r9pj bhz,hc:gg5lxorce 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 instant of time, the mas mmljafl1 fl*t/t:we/ v8oq:*t bu:.ss has position 2.0 m, velocity */ buf: l t:w/ql8mjlt*va:of s.1 mte3.0 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 1yn)k; z0ysh6ho exvep:7 s.gu x u/1pto the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to thu)/xks6uo7 zegnhvx1;y1h e .yp:sp0e 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 hr i3ghim .imgyih2.)* iis9 1figure to the right is sliding to the right along the floor. A horizontal force of 10.1 yiig* 3.m 9 iii.)ihmhg2srh0 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 with:

  00.32: A block rests on a flat jpyv0 )n*uc(d d e.dx0h65jkj 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 is first pulled across ;p 84o tr0ubcna horizontal steel plate as shown in thrput048cb no;e diagram 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 makes the ald:qb.prg8r46 . csk 9qc. btjngle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and thrd.8t q.6j.c k :r4pqbbs9lgce static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle o sc tf4p8d),v (e)sxxkquj4 ,patei -:f $30^{\circ}$ 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 12sgv.lnw; ki second plane (where friction is significant) in inclined a.2 knv;ilgsw1t 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 plane has a gravitational force of magnitu3cwzy2nj q yn8p ada tn,x7h(*:.cr d8de N 10 actin8 r8y*ac3a p 7tcx ,n2wqdjnz(hn.dy: g 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 the x-axis is parallel to the inclined surface.

  15.13: An object is being pushemw 8kq22 *qrzad at constant speed on an inclined plane. The free body diagram of the object is shown with the gmzra2k2* q 8wqravitational 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 represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg w;ylky+s0vnmzx 0qh9s l05 1aiith a constant speed of 5.0 m/s straighavhzx y0ls ;s9 ln005ky+i mq1t up 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 anv nhm7,,b kg48:jg gezgle θ . When released, the block does not move. It is determined that the normal force acting from the incline on the block ha mgzk8 ,gv e,:hjngb74s 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 mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a frictiont gq ye:u7l2 5nbm+3qjless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline ru2y qe 5nbq+: 73gjmltemains 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?