07.10: Contact forces are examples of which,e rcgjtte / 7co(9xm;t)p3b l of the fundamental forces?

  99.02: Which of the followu 7,opo4aj n0qy3sn p4ing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of 8 g2rd/o /ub6uvqrgx--z, cud hu5fg, rubber stoppers ang- gb,vurc 5xg-,/8rq 2u6dfd/uu zhod their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C,rf6oa *krll7:gvls j :1k/zp6 remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contactlk:z*pg1ol vrsl/rf66: a7 jk force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a serietilahoje h2d-p/+mkv :a z699s of strings as shown in the figure. Which string has the greatest tension?6z/va+-pkt:i9o2 9dmea jhh l

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。aaxp n/e ne87gx-smf 3wg* 3/etre stationary. The mass M rests on the floor. Which one of theg sgf8/e*mpn/xe e- x awnt733 following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following s0ulx 2u5 nt .r;9kso00wx tlntcientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional su0l0unx t9lxw;rt2on 05kt.to the displacement.”?

  94.26: As shown in the accompanyc xbnq6j4nk+ j 8bt3+king figure, a force F is exerted at an angle of 8bk3 6xn+jt nbj kq+c4$\theta$. 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 horiz + 1ly9lloabo+ontal floor at constant speed by means of a force P as shown to the right. Which of the following musyo9bl ++alo 1lt be true?

  99.08: A weight can be hung in any of the following four ways. In/k4bp.u qxt5 p which case is t5k xup/qt4.bp he string most likely to break?

  96.39: Assume the objects in the following diagr f qe p;(ruoi8e*5bo,rams have equal mass and the strings holding them in place are identical. In which case would th;e q, (br iu*8erf5oope string be most likely to break?

  16.10: A person wishes to accelerate an object upward un )v2u+dcc3)ew/d brck iformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W repk 3w)dc/eucvd cbr )2+resents 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 ha3y*4u qt0+ *m9 j:bljruutunqs position 2.0 m, velocity 3.0 m/s,and mq n l jb+*:*3tt9uyu0ujurq4acceleration $4.0\;m/s^{2}$ . 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 rough3 m0 3lqel/hqgm0u n6s-)kkx9 vguz z7 surface by a horizontaqgzu-3znk0m0/qleg vh 3lk6xs) mu 79l 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 rig,ih3gfdx l,+l ht is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coeffilhf3,g x, li+dcient 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 plg m4a9w7ido-s ane 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 stee))7i : zi2pwutz-jm cll plate as shown in thez-t: 2 7i)iwpmlzuc) j 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 fvhd 2 *1hcg a2w-mi:uangle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnihc* g-v i: 12dhw2uamftudes 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 angd 3 o(t)uk-3 qken:fv9c -sxadtjah 06le 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 (w7f dt-cc5pk -ghere friction is significant) in inclined at the same angle, it wif5 gt7-pkcc -dll 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 gravitationalendocm f)62 :q 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-axisd):m n qefc6o2 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 speerozw2l)f 4m z:d 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 choices represents fr 2o4mwzl:)z correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of bpt n*kzrfp7lfv:2+ 45.0 m/s straight upl 7r4fnb2f: tk zp+v*p 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 inclinb/(h/ scnj pmkb), bzy-y/k+ ned 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 bej/y+n/, )bb(pcb-n h ks kzy/mst represents the mass,m, of the block?

  17.40: A small object of mknvkzg ullt4+ b:)lfx+2v 3 x(ass M is released from rest at the top of a frictionless ituln2lkz3 +v gx xv+(lf: 4k)bncline. 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 the incline?