07.10: Contact forces are examples of which of the fund-4yslguwy:z ;amental forces?

  99.02: Which of the following terms is NOT related conceptually to thet j-lu5f i.wu2/ vgw7fr jbu27 others?

  02.20: The graph shows the relationship between the mass of a numbey gwq4u) gl0kb(.w5f xc7 dz4tr of rubber stoppers and their resultgz0y 4gw7w f45t )xl.ud(b qkcing weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, lt0/mm ujd nb,;abeled A,B, and C, remain at rest on a table. The magnitude of the gravitationalb ,ujdn m;/0tm 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 a classroom ceilj jbsmp;,)v3ow q*m* wing by a series of strings as shown in the figure. Which string,*mmww ps3j *v ;bjqo) has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M =tbr01x3 t zs)n1h2s scgk5f 6g 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the st csstk x11r)36zn0b2tgs g5f hring connecting the masses?

  14.13: Which one of the following scientistskk0k-tqp juk by j)1kwv./ o)0 is most associated with the following statement: “For small displacements of an object from e)-wjuj k).ktb/p1v qo0 ykkk0quilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying fi tz5yd 7xbl tnpkl1m,/(4/clmgure, a force F is exerted at an angle of c mm b ttl, dlpl/x51/4k(7zny$\theta$. 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 horizo 1oe0o6/lcvl zntal floor at constant speed by means of a force P as shown to the right. Which of the foe61/ vl l0coozllowing must be true?

  99.08: A weight can be hung in any of the following 5( ea2:e6;n( ur beeik jasb2dfour ways. In which case ikb5s ;:6ee22aiea d((ue bjnr s the string most likely to break?

  96.39: Assume the obje6k:a :muv+nns ho8lf 9cts in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to bv nksu+:a9 6f mh:8olnreak?

  16.10: A person wishes to acb,+m 4,af h4jt g2z 8vv5t:j4ok fkwtxcelerate an object 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. Ig 5gkhftax4j+t ,kz 4m:2obfv wt84,jv nore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at onjyg+9swoiq ub8337iv h 5iyt u lqp,a y3+.i/he instant of time, the mass has position 2.0 l3.ip3 qy 5gy/ ,+qw iuoi39usyahb87iv+ tjhm, 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 o40ht.a.hu emt n a rough surface by a horizontal force of 15 N as shown, during eu .mht04a. ththe 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 right is sliding to trmc+j sb,of2oi6q1 6n9 ms+px xnj9f1he right along the floor. A horizontal force ofno9f x2+c1mb6n m9s,j+ j1 s6x ifoprq 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 u8**g3ggbe or(-q4vr zija9o flat plane 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 across a horizontal steel p rvkx)+179 rya7 trh;g+rcwfzlate as shown in the diagram 97rr7 x1c++kfa)ghr v zw ty;rA.
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 /nihf:v:6o ml incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. T nohi m:lv:f6/he magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block 9j-dn( htfu,)nej0eaa5ziat f 6q *9hrests on a flat 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 placed on a second plane (where friction is sig5l oo-ltlsoy( + aat*.nificant) in inclined at the same angle, i l.*ot(lsoly5- atoa +t 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 ince ( 9(mz;dn ,hx6sccsdlined plane has a gravitational force of magnitude N 10 acting on it from t9hxmd(z(d ss e;c 6c,nhe 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 conc3;ig) c*lh, 6pzz gh(qewzc3lev , m9 uhm-2cstant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented blmc-lhehpzg ch;3i* 3eucz9 c2gqv m6 ,)w(,zy 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=6.0lek8dq (gp(8q eo:+wuw tje*. kg with a constant speed of 5.0 m/s straight up a flat surface (8 8qwe.o*: j+ku g tedewql(pinclined $30^{\circ}$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 -2v0f2c hkh. zxy hkq*of mass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined that f-ky0vhk2c 2zh*h q.xthe 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 the block?

  17.40: A small object of masr d:.(: )qdmzh pvjm/yv5oif sb m-hh4y+y3l*s M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ witrhbo dmv5:)myysv.z:idjq yflhh+m / *p-3 4(h 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 the incline?