07.10: Contact forces are exampleq3aqbpqcat,mh /r.: 0 s of which of the fundamental forces?

  99.02: Which of the in (r/sz2wepaw, 5x 0a93qr t0,fxdzyfollowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubber-f; mo1 gw5bhj stoppers and their resulting weight on some far-off planet. The slope of the gm-gw;h 5ojf 1braph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at 6un0yhei+u2 1,n4 mqcvt cv 6erest on a table. The magnitude of the gravitational force 6mueqyvv,c20 + ncite4 6uh1non 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 suspended from a classroom ceiling 2y z: ;o,w,p)0,pq x*oue0 obdxsespa by a series of strings as shown in the figure. Which string has the gr; z2s,weyo ,qppp,0:e0bxo doa *xus)eatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。3kbjr+6soo f a,)c5 idare stationary. The mass M rests on the floor. Whicj)5rosfk b6 ,+3cado ih one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the folloczbw (s:mu4 p2dts+6 qwing statement: “For small displacements of an object from equilibrium, there is a restoring force that is pro d:2t6 +p wsuqcbzms(4portional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an ang 1l-idvc6+ x3ur olq7jle of 1o6qjd l u7i+lv3c-rx$\theta$. 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 wo qct tzk6+p.e5oden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must 5e+ c6tk tp.zqbe true?

  99.08: A weight can be hung in any of the followin xfpnl d1+l2,gg four ways. In which case is t1 gdn+2plxfl,he string most likely to break?

  96.39: Assume the objects in the following diagrams have equal 4pz5hza ,: f/4mfti bfmass and the strings holding them in place are identical. In which case would the btz zhpaimf44,5 /:ff string be most likely to break?

  16.10: A person wishes to accelerate an object upwarq1c4uy sdd m0:d uniformly. Which one of the following choices mus :0ucsydmd 4q1t 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 the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, n4z78 l4)onx7hmv 6chc)pt rl at one instant of time, the mass has position 2.0 7)hx7lc np86h4v zomnc ) 4trlm, velocity 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 is pushed to the right on a rough surfaj1tr+ mfu./ 4 gcznd)ace by a horizontal force of 15 N asg. um rzt+4 1)/acndfj shown, during the push, the object accelerates 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 righ o,3qeuqup px4(2 g .hiwwck41t 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 pik(uq4c,3hxwp wou42 q1.ge box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined at a9zx k et2frh8xur;*h;2il-w u n 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 iqb .th1uvct5xqr8 ( w,s first pulled across a horizontal steel plate as shown in tt . u1bq(rv5chx q8wt,he 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 angler7muw/h i 2ip/gc,lxuq bl*6.* qx /os 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 on the pl*/mi7,bxsr/uuq.h i62w*oxcgql/ block

  01.11: A 5 kg block rests on a flat plane inclined at an angle o 9c cusmzc/2jk8 ago /fq3+7vif $30^{\circ}$ 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 oifvgltc9b2ulg/ d2b1 v)pv6 +n 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 block and the second inclined pl gv6t2vi2blp )/u g1dvc+fb9lane?

  08.08: An object on an inclined plane has a gravitatpv l u8el7okz+ivp083ional 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? The y-axis is perpendiculalvoip70 pe vz3kl+u88 r to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushe89dd plwn+mwpbaq ;p66ua-i p 3durg4c162ovd at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represent91wi8cb6 4pdwldn6aa;vu pdp uo2pm3q+-g 6 red 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=u inet m; ua(;o2e,e zliiw,wo2xe *746.0 kg with a constant speed of 5.0 m/s straight 22ioeoz,*(l;e u etai wmwn ,4xu7;ei 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 incnd iwzd* 9g 4hgg* gtv)8:zurl :ea*9klined 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 between the block and inclined plane is 0.92. Which one of the following choices best represents the mass,m, of thl w:gdz 9ggg*tn*kr he) 8i*zvd:4u9ae block?

  17.40: A small object sq0 5xfjd 3y66g+0:vvwgw dxv of mass 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 remains gvdfj vw:0q6v0g5ydx63 sw+x 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?