07.10: Contact forces are (4ald p ,wget/vt.9mlg3j za0 examples of which of the fundamental forces?

  99.02: Which of the foo-x73wgozy 9 qwk9/gj llowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the maq*w uuxr1,y*o1dx (prss of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a repo,1rpxruxw1u(*dq *yresentation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a tabcq wt xuso32r i50),wvle. The magnitude of the gravita 3 rw,5 0)xvq2sowticutional 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 suspended from aom5bl6 n)4 iau classroom ceiling by a series of strings as showniau)o64b m 5nl in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the m q) yi.qifkvy8 i*a.8iass M = 14.0 k。are stationary. The mass M aq)8iy8ifqyk.i.* virests 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 sci7 k;)zqfeu;m gentists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is propo; u;ek7gqfm )zrtional to the displacement.”?

  94.26: As shown in the accompanying fig8,oo*l m.mm/kc x*cyl:hq7scro:,u qk . ag ,uure, a force F is exerted at an angle of 7hoqcks mcol .ly 8 /,a.mk ,r:,gu**m:ouxcq $\theta$. 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 constant kiknp5umj f189r ss.* speed by rn 81s5iu kmsk*jfp.9means of 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 fof--vbnbgc hd *di4 /2mllowing four ways. In which case is the string most likely to brea4 gcd--i d fvbmn2hb/*k?

  96.39: Assume the objects in the following diagrams have equrb1o b ern:lc9*kp 8o2al mass and the strings holding them in place are identical. In which case wouldbpnre9o*o: bc r218k l the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one-8cnad6 0lr.,bmp as d of the following choices must be true of the force F, provided l0b dc-p.mnar 6,8dasby 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, at one instant of time, the mass k:/0su o yqeh7has position 2.0 m, velocity q uksh/7y: 0oe3.0 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 oncsi ro) d+1u*p.v;x zn a rough surface by a horizontal force of 15 N as shown, during the push, the object accelxcu.;vp*z )1ridsn o+erates 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 rix2ncbn ,q,bz/b1d gth y39ap 2ght 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 th2c bx2qa3 ,nbydh9 bzt1g ,p/ne box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined 482xurir:;aq kio -liat 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 k(2 izoj8jg1b6jg f g1pulled across a horizontal steel plate as shown in the826g bi1ogf1g jjzjk ( 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 angle θ with 6yrg./ mfowgark;c (d me6 p9+the horizontal. The block remains at rest as θ is slowly inc9m /gyr(rap .+6d m6 oefw;kgcreased. 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 an. .kmbqx 4djo6gle 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 (where friction6 c:i(r+ xj/uuul0)pauu9fvj yip1* lqh1-gu is significant) in i uul6yi1a 9cppulq*v) +uj:xu01g- (fi/jhr unclined 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 plane?

  08.08: An object on an inclined plane has a gravitationamn+ v/g0nb nr /l2h xoor *kvd;10tz*ll force of magnitude N 10 acting on i*x g 0 o2vv/nln1+;kthbn/rmlodr0z *t 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 pushed at constant speed on an inc wk dmy093+mfelined plane. The free body diagram of the object is shown with the gravitational force represented b d9m0eyw 3fkm+y 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 with a constant speed qul7t.e0ry/15ws fbr of 5.0 m/s straight up a f5fy.t7q r rwbu1s/l0elat 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 inclined0 7l mao9 atrggq0/*ve 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,g gva0ta/9*lm0qroe 7 of the block?

  17.40: A small object of mass M is released from rest at thez t*camp08;zt top of a frictionless incline. The inclinehas a mass M and makes an angle θ with th0zczm 8t* tpa;e 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?