07.10: Contact forces are examples of which of the fundam0m ly):k;l cjdental forces?

  99.02: Which of the following terms is NOT related concep n;;6 a5rozs lsog7ex)tually to the others?

  02.20: The graph shows the relt;tns0ld+xps8 x 8uo5 ationship 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 res ud85xl; ox8+t0ptsnpresentation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on qz(0e+nb n/udo1u;; vv rl2pam97tyn a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact forcntq(7p1l9dn 0 brn/oua muezv 2v; y+;e on block C from block B?

  14.04: Three equal masses ox3 2s lg3:x hn)r4hqdare suspended from a classroom ceiling by a series of strings as shown in the figure. Which string hq n3 xs42hd lr)3hoxg:as the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the6x3boux2 a3 ql ep3,9fszko; d mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents kds3lf ex3,;2o3a69 pq oxbuzthe tension in the string connecting the masses?

  14.13: Which one of the follo tyin9ds5(cnf33.ai 2,o whjqwing 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 dis5 wi.tqhnc s3ai32 9 (,djyonfplacement.”?

  94.26: As shown in the accompanying 3gdj3fd. 9-lu(kgzz xfigure, a force F is exerted at an angle of g.fdxu-9dzkj l ( 3g3z$\theta$. 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 sl.*ww :ndzzq59i-whpq5 h8gbox along a rough horizontal floor at constant speed by meandnhwl.9 i5z p8 5:-qqwwgh*szs 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 t)g3i8j e/zwsvnna .b3 he following four ways. In which case is the stribevz njn 33.gi/aw8s)ng most likely to break?

  96.39: Assume the objects in tc8m4n 9 )zfgc;lpabbz 09k9mthe following diagrams have equal mass and the strings holding them in place are identical. In which case would thbm0; z9c pt9 b zm9gnkclaf)48e string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one of tplf:5fmus b5 /he following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of the gravitational force acting on the: pflb/fu5sm 5 object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves alqj8jek8p1 - nsu(yd j;ong the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and ( nkpydj8q8jes-1;ju 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 surface by9w. x7rq s)zpizv6dpo3lw+ 0m a horizonta9wwqs r6xzl pz )d0.vomip73 +l force of 15 N as 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 rni ;odb7*;vepdhb2y ( ight is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. dy2*do;bebh7 i v;n(p 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 plane inclined0*zip5v-t; 3wph yze8f tg0aj 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 a horizontal stee3) k uahel1go n*-pua(z7 zirhy5b2(rl plate as shown in the diagram A. lahy(eab5r27z) hkupoi u r*1n g(3-z
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 angkmf( 8b0+aivg le θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the stagaifv +m k(0b8tic frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined aqf) m;;z)zqhy mlue7 (t 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 significanfp.0jkj k 7-,p)a1fo c*kdrpet) in inclined at the same angle, it will b,1c-j 7j kpkdk pora. fe0*)pfegin 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 h.0f pq7w2lzu 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 the coordinate axes shown in the figure? The y-axis is perpendicular to the inclh qpw02u7.flzine’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed ojvt bn/,vpzgvu0 : 7)mi. f-ovn an inclined plane. The free bodyjpo mgfvb7. ):u0-,vn/v iztv diagram of the 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 kg with a constant az.hf1x hiep1d l+d60v j),frdvtw,, speed of 5.0 m/s straight up a flat surface incl.,r,daj1e10h,v+d l6fhxdiv tpfwz )ined $30^{\circ}$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 angle θ . Wh8 k jw ;vo9kvk1iz4wisoqb k;0j5m,q 2en 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 frikk52ib8;jmkz 4s;jo0 iqo wqwk1,v9v ction 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 /glh 63bi3knutorybae458d ) 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 thesmall object slides. During the slide, what is the magnitude5dbyk er)o3i4bau36 g/nth l 8 of the normal force from the table on the incline?