07.10: Contact forces are examples of w. f-m0 wo:nqgehich of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the oqa hlng fdy/48g 70, mzxmg3x+ tmd+q)thers?

  02.20: The graph shows the relationship between the mass of a number of rubber wecip-m voe51o3kj )3n;o jv2 o;0.xs m6u whhstoppers and their resulting weight on some far-off planet. The slope of the graph h3pxu 5mocm63 v0.oiswoj2 n;;e-jeo) vw1hk is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. Tzp8wb1s4 l,louaq.sy y q9t:;he magnitude of the gravitationals8o s9layl14q;bw p.,zt:q u y 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 f 9y iam;hops 9 bcjv4dt 1/+wkx59ss7mrom a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tenssmi 5y4woh;1j cs9 xt+7v9/badpm9k sion?

  16.05: In the figure shown, the me puos:nlonlwk 6:js9n4)) llm.)+2vkt 0ymiass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floos)w:m2nm 6yp l l l:)lis 9.v)n4 jontk+keu0or. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following sciifhef+ryj e4 p9+vzb+sc.st x;: d3m8entists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportionaz:e.4ie;3bff c++mvs r9 tjx 8p+ shdyl to the displacement.”?

  94.26: As shown in the accom hyq(p.r pb 9v5b uh;zhsrf+/1panying figure, a force F is exerted at an angle of h u.;/vhp9rrbbh1pq y+fz(5s$\theta$. 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 pullr 6t).t g)1ysuj mudo,s a wooden box along a rough horizontal floor at constant speed by means of a force P as shown to the righs ro )6d,jgtm.y1)utu t. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In whicr8 svy,v; te9rh case is the string mos89v;t,rerv y st likely to break?

  96.39: Assume the objects in the following diagrams have equalq,54:ye mtzv/.5br d1og fmq r mass and the strings holding them ig f e54o,dvtm/my 1qqz5rr .b:n 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. Which one of (a k mk*w2gzj,the following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of thekzg *wk,2 (jam 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, thnqtv 5 g6lrho3- p2s*ze mass has position 2.0 m, velocity 3.0 m/s,and accto 5ql*p63 -gvshrz n2eleration $4.0\;m/s^{2}$ . 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 horizontx (2 , m)w:jisk9qkyweal force of 15 N as shown, during the push, the object acceleraw2jm skwkx9 e,:y)iq (tes 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 ise-z3h 4e ;mbumaxeb1 8 sliding to the right along the 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 0.2xm1b h38e 4mueab;e -z0. The box is moving with:

  00.32: A block rests on a flat plane t/ 1; umznm yev j(v*,j6cuj)cinclined 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 s,nl1d .19.,pnhq*ztcbg be aunmyo36 teel plate as shown in th1eyzmbq.1 *,dlcnab gnoh.9ntu, 36pe 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 angle θ with the42 kjjl7- /o-tjw*ixq hhd9ym horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the*tho97x d/k 2wlq-ijj jh-4 ym incline on the block

  01.11: A 5 kg block rests on , nwzns6nri7ymfr9/ 9a 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 onxx,i0 tnla /kuz4m1-i 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 inclined pla4i,liux-ta01x /km z nne?

  08.08: An object on an inclined +/fvrmx; b,bwplane has a gravitational force of magnitude N 10 acting on it from the Earth. Which orwvb;x ,/+mf bf 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 constant speed on an inclsbbxj/2i ) 8mgined 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 normgbim x2/ 8jb)sal 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,-i/qks d (ncmgv9k0ko8 z)lw M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface incw-kiksc(md / zg 0qlk9)vo ,n8lined $30^{\circ}$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 blockal4bb h8tesewkb 8:9qgkbgj8/p5 9q; of mass misplaced on an inclined 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 statqg5bl a9kbksbtjp9:8eh4w 88 b/ egq;ic 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 tomzzd v 9,,n62 gynr*wzv01uzo p of a frictionless incline. The incl ugzo02rnm *dz9w ,1nzv zy6v,inehas 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?