07.10: Contact forces are examples of which of the fundamens c8og p9s95if3 bp6eutal forces?

  99.02: Which of the following termc9sof 7)rns;mly8s lcm ( 77yes is NOT related conceptually to the others?

  02.20: The graph shows the rel/drwnbj42 m 8yationship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the gbmj2 nwd 4ry8/raph is a representation of the:

  10.15: Three blocks, labeled A,B, and n2ene7i o5 v9uC, 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 contact force on blociuo nev592e 7nk C from block B?

  14.04: Three equal masses are suspended from a classroom cr znp:f25wk(0dx 8 ewgeiling by a series of strings as shown in thw en d(5z8p2gkwx0:rfe figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and th t(fv7/v7 uvzne mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of t7fu/(vvt 7zv nhe following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientist j+w pkdyg8jd-:gby 9.s is most associated with the following statement: “For small displacements of an object fr 9y8 :bgydd.+gpkjw -jom equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exertaa1nt8npx ,hjqf - g:a-iv:k0ed at an angle of a gnf8a n0-j:vx -ikhp1q ,t:a$\theta$. 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 hori) w gwf/ )d1mem.(lpql;wt+eifqxa)8zontal floor at constant speed by means of a force P as shown to the right. gtpfiql);l1. +ea) 8xmd) eqmf /www (Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In wha*k6 joeufp/b -8h.s xich case is the string most liupx-*8e/ s.h j b6okfakely to break?

  96.39: Assume the objects in the following diagrams have evrxgh 4 v7:j*:rxslp 48w/p rnqual mass and the strings holding them in place are identical. In which case would the string bevj rp w/*l7 nvg: 4sx4r8p:rhx most likely to break?

  16.10: A person wishes to acceler)uwr(+uc dl5+tpqy r* ate 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 gravit ryplt5+urc+uqw*d () ational force acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass cinvoi(42/ v tzoh+ 4 t/s)mhzmoves along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,an tvh 4o+hm2(io)czvi 4/n/ tszd 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 object9g a;/kt+u k( *;8mbwhcslxsu is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the x s /mag+;9lt; wu8*cbuhkk(sobject 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 the r74*6u .n m,neici ekske: vq8bight along the floor. A horizontal force of 10.0 N is being applied to the right. The coefvi*,:7mq 4k8nisebe6cnk .ueficient of kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests onws(ia v6 g0 vb+yl0, hjhl.ji( a 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 plate as sh4tjz/e9i 6qgq0qvg. oy,i3 k* s*tewgown in thesqk9i.g4,tj* igeeq6 wvgty* z3 0/q o 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 t3qobb b *rf6b5he 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 incline on thb3ro 5bbqf*b6 e block

  01.11: A 5 kg block re1h6- ndzb pb:xg j.y,gsts 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 plp ku6v4b9pyu 0z iy5g5 vk fes+(5r4fgaced on a second plane (where friction is significant) 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 second incli gpzg0 +5urku59vfpk6 v54(biyys4e fned plane?

  08.08: An object on an inclined plane has a gra1sbr yo 6z k(z uk0zq-e.c+um2vitational 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 the x-axis is parallk.z+cr0ue buq1z-s( y 6km2zo el to the inclined surface.

  15.13: An object is bein 1-dk9qik1 vpno2frjhef toa6)p3q 3/g pushed at constant 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 oh9a 3qvij-nrd )fqp23f oe /kp1tk16the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6. tvi 5xjt6:-p x,.iaph0 kg with a constant speed of 5.0 m/s straight up a flat .6,ipv:jht-tp5xa xisurface 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 .h * :wj55 rzinldd,myinclined 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. * hrd5j5il.yz ,n d:mwWhich one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from re .foyno0*m qo)st at the top of a frictionless incline. The inclinehas a mass M and makes an.*m qofo)nyo0 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?