07.10: Contact forces are examples ocr0 ;l3rn86fk r s5pljf which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the othersw):m r k2vt8vjgpbjywi v/ 9 8/6-dezu?

  02.20: The graph shows the relationship between the mass of a number : u+sall(6(jyd: vvkmof rubber stoppers and their resulting weight on some far-off planet. The slope of the graph :(:llj(vvsam +d6u ky is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remah377+waiqnk08 ue aqkaf g 8+sin at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magna8 q3gai7k70uk+ w8nfasqh+eitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classrookk1w5h m hiuod9p-m1(tfa 4:a1jw1kom ceiling by a series of strings as shown in the fik 9o1- i5jd1w hmmauo1 ak (pfhwkt:41gure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m)lgeb.2pb6 bg byuurm y7*7t6 = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tensigg2l bb)ebu7r t6 7mbpu.yy*6on in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the fogp ;4rf)g/t uy .ic p4n2tp rfkhe6i/:llowing statementppn fr :i6ti2k;hc./gy r4tp fgu4)e/: “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 fon:c8) -pcouiv t ri2rft,+, l,x.xishrce F is exerted at an angle of rci n+ )xri- ft2vosix :uhp8c,t,,.l $\theta$. 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 hor c)ty/ieu/ezsx 4t,71 ftxchv 7z8:jy izontal floor at constant speed by means of a force P as shown tc 7:icz,t/ s4)utfvj7zxtyxy/1 eh e8o the right. Which of the following must be true?

  99.08: A weight can be hung in ,plmmh+0 .m* d7 vnfqoany of the following four ways. In which case is the string most likely to bre,m70hnl+mdm o* pqf v.ak?

  96.39: Assume the objects i i j0b+2 9jqqg:wtcbk7n the following diagrams have equal mass and the strings holdij9 2 7q0qwbikjg+b: tcng them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. ;mx ( zqcxe k2o4jho1:Which one of the following choices must be true of the force F, provided by the person onto the object? W representso4moqh:;2 j1 cekx(xz 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 o.-pw8- xlosur/ d6 iaaf time, the mass has position 2.0 m, ve8 i -alx-adw6pus.r/olocity 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 surfacesl*c; .ori 4go by a horizontal force of 15 N aooi .s ;rcg*4ls 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 tw m0 +m b9n6w 2u-d*wofgl:hxa u2il3jo the right 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 betb- xujnm2ola+u9fi lmw*h :6 gw3d02wween 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 angle ofln 6o6o z3ea,*kl4vtn70gwl q $30^{\circ}$ 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 x+mh yyk8s282kzpts c) snm*,first pulled across a horizontal steel plate as shown in the diagram hk+s) nmcp2yx*s,8 2yms 8t kzA.
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 0 dbmc.d c(ti5incline that makes the angle θ with the horizontal. The t0id m(c. 5dbcblock remains at rest as θ is slowly increased. 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 pl(bj ddl 0rswb7g(6df8 ane 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 (where friction is significant)ol 9/hyp-tq)w- 9vw ct 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 secon yw-/ttvc- hw9op lq)9d inclined plane?

  08.08: An object on an inco -a 3 )v(*kbs/kocwvrlined 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 thewo ov)sk / *-3kc(vabr 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 . /p yzvfit,s:ud s ztaw7)6n2speed on an inclined plane. The free body diagram of thnyi,a26 zz ) fps/:7tut.dv wse object is shown with the gravitational 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 kgwqb/9 i06nlob with a constant speed of 5.0 m/s slb9nib 0 wqo/6traight 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 t ,puud t5,y5fon an inclined 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 p,5u5 dyftt,u 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 fr f0x vnh-a* qcz,2f72ftkg:pyictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thesmall obje t7g,vf-fyhc*xpzk fa2 q02n:ct slides. During the slide, what is the magnitude of the normal force from the table on the incline?