07.10: Contact forces are examples of which of the fundamental forces?f7ltce ce-q1qaw 3w7(wpbb9 ,

  99.02: Which of the following terms is NOT related conceptually to the othe 5h j(sq;r2ljers?

  02.20: The graph shows the relationship between the mass of a number of ii:6(3 xrzrk sowb) xmriw6+- rubber stoppers and their resulting weight on some)3rbzi x:(-w xwr+r6i iskm6 o far-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 table. The 7/zhtn ws*)ssmagnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C frs*thsn/ )z s7wom block B?

  14.04: Three equal masses are :ue2binh9 z y6suspended from a classroom ceiling by a series of strings as shown in the figure. Which sen9h:zyub6i 2 tring has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。algq4iq,c:z 9 gre stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses 4glg9zq:c q,i?

  14.13: Which one of the following scientists is most assoc(upi/8-bku awiated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional tkb ap/iu8-w( uo the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle ogd lzt .+j-ee5hy* x1om5m.r kf eh- .o.dx 1mr5ge tl +jkmz5*y$\theta$. 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 mpi 3:2y)ohy65zvsv frough horizontal floor at constant speed by means of a force P as shown to the right. Which of the foy5pm 2o zyvh6 )f3is:vllowing must be true?

  99.08: A weight can be hung in any of theb7 c4r9ck:uin2uq w9:p qvz7p following four ways. In which case is the string most likely topqp vkzqb9i:4:r7un u7w2c9c break?

  96.39: Assume the objects in the following diagramsv67u/4+cogz m1bh cd d have equal mass and the strings holding them in place are identical. In which case would the string be most liv + 7cg1dz6chdm/bou4kely to break?

  16.10: A person wishes to accelerate an olz2l184j ul sdssw7*j,7lvlq bject upward uniformly. Which one of the 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 object. Ignore any 8svls7*7jjzu4llsqll ,d 2w 1 effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along thymb.x )cka x4qs 6avy2tn7p2/cn0et 6e x-axis, at one instant of time, the mass has posia nqckv42s)nx 0x cptyab26.t 67/eymtion 2.0 m, 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 surface by a horiz1waw4:kl 7rfwlh 18n lontal force of laf 81wrwl14 kw:h7nl15 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 showelv :p ic4rdq.2j03e pn in the figure to the right is sliding to the right along thepl.eve4i:jd2q cp 30r floor. A horizontal force of 10.0 N is being applied to the right. 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 pltnvlpk5, ih1 . nx667t;bo4*3tuklba5n blouane inclined 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 across7 t qf9qfro;k( a horizontal steel plate as shown in the diqf;7 (fkro9tqagram 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 inclince6im5n*b7 fne that 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 inclineb me75c*n6fin on the block

  01.11: A 5 kg block rests on a f,1m 9e5sa2vsn , q asoqux)c9elat 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 pctyttp/ - m6j2ky *9nilaced on a second plane (where friction is significant) in inclined at the t*m tk9y-tj/ny2pi 6 csame 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 inp9t4 0zw;qghas 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 incline’s surface while t49qni;p0 zg wthe x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constan/rah3pmy8xyflc gmv8e8g-a7 e2c8 o/ t speed on an inclined plane. The free body 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 choicefrgg p/ae8y23xvemoh c- lamy887/ 8c s represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a const. qk0( ltcbj hdo*v*+want speed of 5.0 m/s stra o*w+th(kj0lq. c*dvb ight 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 inclined plan8vw t1unh b3f*4xwma ;e 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 coefficien4wnt hbm*;af31 8 wxvut 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 released fro1ftx*a8 ahey- 6 +a18wunoe:zm ur7com 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 magnitude of the normal force from the table on thehy6t+f8wce a: e zuax1roan-81ou7m* incline?