07.10: Contact forces are examples of which ouu0xwyo; u.fm6 *6pav ;2yaw.30lr qfg a.hlgf the fundamental forces?

  99.02: Which of the following terms is NOT related concepte7 9ml (,b;bvs 7brz p8s7gokoually to the others?

  02.20: The graph shows the relationship between the mass of a nugeu8y o4qs:2h8h;kdmmcod8 2 mber of rubber stoppers and their resulting weight on some fardemuhqm84s8g kd ;2: 28c oohy-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 t1tsl/ycv lf )vj0 58;w3wizrrable. The magnitude of the gravitational force on each block is indicated on the figure. Ww v/18wi ryjfz3)tcv0; rl sl5hat is 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 ser(*c96us5 0)rs kc 8puugqoxiries of strings riqru06s *(p u)8 coux9cks5g as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and ar9 fi) .x7r fbzn3if otm7i+ns,(sx3 the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension ,rs77 93.f nb+fztxs(rofx iai)3im nin the string connecting the masses?

  14.13: Which one of the followi;w*nl7i /*sfvaam8w l(h lwn-ng scientists is 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.shfw *;lnwni aml8*l7va w-( /”?

  94.26: As shown in the acc.gef ,)9, umx* f 1sg.ibcvqlfompanying figure, a force F is exerted at an angle of .ge,)9*m uqfcfv1g.l isb,x f$\theta$. 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 floor at conswu99e/h:c*w4z kk p mqtant speed by means of a fou49kk:zm wec9q hw*p/rce P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any4rb.d s4ifex1 swsc4, of the following four ways. In which case is the string most likely to bre1esbdsi,4x sc wf .4r4ak?

  96.39: Assume the objects in the following diagrams have ebkit.(ns xdfaymc. :-3 95zazqual mass and the strings holding them in place are identical. In whifb5aymx:.3 ti-9(snck z.az dch case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifort a-/lj/ujt* * s4mweamly. Which one of the following choices must be true of the force F, provided by the person on - a4*t/wa*ejlms ujt/to the object? W represents the magnitude of the gravitational 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-ax45k93lc :z vyzzx:q uhyzoq) 2is, at one instant of time, the mass has position 2.0 m, velocity 4:oyvzz3cl5qzk9 x q: 2hz)yu3.0 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 obj vxtf-qiy,)at 5n0;yrect is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniforml50v,t;qfi) xt y-ayrn y 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 figur.dyhr2lt )o*a e to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. Taht ) dr.y*ol2he 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 plane inclined at an ancn::sun w8f vzd7j*t5hs9 3pd gle 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 horizontal yz36 h2p2zn s n/-uw.,ntdqjl steel plate as shown in theyswn l 3 ,z2tp/6hzd nuj2q-.n 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 tha rc: 1ua2:)p.il4yd ezfa, xcit 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 o)p1cyfxu z ai42 c:li. rda:e,n the block

  01.11: A 5 kg block rests on a faw4itw l)+4uxg49z wklat 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 (0snf3 xq1x4 odp wls4.where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What nxs0dplsx4of .w314q 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 old3)(z u,duvjpk9z2 ;x* fkuhf 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? Thzu uphx 239dvf ukj)(;z*d kl,e 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 inclined plane.r1k /m ld:9oxv The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the ardvl:9m1xo k /pplied 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 speed ;wg/scc/cc:w 3v6.,vxrf(dw 4yegtxxl km5 ) of 5.0 m/s straight up a fla k3c cct (5x/4ylxmfgr.w ,c6:g)x; wsev dwv/t 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 m.p1)+9w ra jmlx .tgwaass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined tha mp .tj+a)wrxw l.a9g1t 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 mass,m, of the block?

  17.40: A small object of mass M iwey ,b54:pjk p9lw/ fws 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 remains at reston a table as thespw:5,kpj ewlbyf 4/9w mall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?