07.10: Contact forces are examples of which;w j5k-uj08t o o.oexm of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptu-9cvcbc6+c.w k wvu c+ally to the others?

  02.20: The graph shows the relationship between the mass of a number of rub :3,7 bkpx(i 5ore7r3giwevg dber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of 7rxke(g3p3i5o bdwe,7 rig v: the:

  10.15: Three blocks, labeled A,B, and C, remain at re(h m;e eh.tw,y zyr)e.ls:p4 zst on a table. The magnitude of the gravitational force on each block is indicated on the figure. What e:4 sepmwhzerz. ;t,)y( lh.y is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a serix/e3zpf7ehk +)8zg48xy me bxes of strings as shown in the figure. Which string has the greatest tension?z8k8mexh 7ep x)4+yfxe3 bgz/

  16.05: In the figure shown, the mass m = 6.0 k。and d(i5 np* eu-yvthe mass M = 14.0 k。are stationary. The mass M rests op - e(du*5inyvn the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with tdwvb )kz;g4ha l;1u ;ay-ly h:he following statement: “For small disbyu; 4a: v) lz1gla;h;kdwyh-placements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted atvbhjdl k8ze32 r/eq,rn-x + o 9/(txbp an angle of t dp,kh/8jrx l3e( o-xqz /9veb+2brn$\theta$. 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 horizontal floo5,ye-lyhigsuhv9l 4y9 + :l cdr at constant speed by means of a force P as shdi lu yel9g v4s ,hc95yy-l+:hown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of tqd+ :d2htma3f:aytm it ;e ,,7qj-wd zhe following four ways. In which case is the strim ht:djtydz2 +dq3,,fa w :ea7qi-;tmng most likely to break?

  96.39: Assume the objects in the following diagrn 17wqnu: z)elams have equal mass and the strings e:n1)l w7 uqznholding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whicaio*j77 lw0 :qukumzzw5uu 6 u1nok 0,h one of the following choicoa6ml,*0z1wu5kokzuunu:770ijuq w es 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 effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one inst2 ugdu8:ei 8oaant of time, the mass has position 2.0 m, velocity 3.0 m/s,ando8iadu eu28g: 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 -, i2woab9j lyto the right on a rough surface by a horizontal force of 15 N as shown, duwa -29lb,yjo iring 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 right is slip rbfoog6(i / a(igq-;t7.t zvding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic frictiz tbv(/; ifrp( g.i6ao7qt-goon between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat ycc(7vjjgh us )h )2ahg3p0,lplane 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 horizontawvk 2pn/)ygeqruo8 , 1l steel plate as shown in the diagram A/2v p 8o,gyek rw1qu)n.
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 angle h woi41z,/;ws3d:vb8ns zvh5yky 9 0r ow)znj θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force vi4 0koh/b5rzj9w;w8hzn:ydozw ys3 1vs, n)and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at a.bh46 *drtjwtxw 4x w+n 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 signifd 22+; pf8oj yiuhd*ukicant) in inclined at the same angle, it will begin to acc;+p2 d* uif8hk2jdo yuelerate 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 gravitational forceqls+lb *,j; bn 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 t,qbl nbjsl+ *;he incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being 4ifd 9e2hap *zpushed 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, aiz4e*h2 9pdf 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 constanwt/v/cy) r (wdt speed of 5.0 m/s straight up a flat surface inclined/ryv w t()w/dc $30^{\circ}$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 nk wai(b 2jf.yixc3+ r9n+6auof mass misplaced on an inclined plane of angle θ . When released, the block 6nuk +( ax9a3n+ . wriifby2jcdoes 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 best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a f2x2 ifck z;fcuep*xg(s4 v43 erictionless 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 pfse(x e24z g* f;i3k2 uvx4ccmagnitude of the normal force from the table on the incline?