07.10: Contact forces are examples of which of c71k( t: 8nrom;r zsk09 dskr2bhcdx mbn:;y +the fundamental forces?

  99.02: Which of the following terms is NOT related con ub)gbtpw/ 52dceptually to the others?

  02.20: The graph shows the relationship between the mass8rg8;qbz*5iydi6 w z4 5v tb/qx9xv.cl7smb u of a number of rubber stoppers and their resulting weight on some far-of5luq y 75xz sc.i8ixbz vg tbdwb9 rv;4*m/68qf planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magni .3ojb2eqw-+gwdfl.gd bg0v(tude of the gravitational fo d0fw.l3(g2g.ow j ebg+ bdvq-rce 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 classrola(rlu -7vg7)c4qujdb 6wu 4dom ceiling by a series of strlva (lgr ud4ucu47-j7bw qd 6)ings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass mpti*x0ylxo4 hh 65cbug aq9jd4( u 39e = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the 0exh(itl59c 4h*gx p3jyduqb4uo 9a6 tension in the string connecting the masses?

  14.13: Which one of the following7 9u 8sz; 0pqaqi2uquz scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restorin 2uuqiquaz zspq 098;7g force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a fo cz6l6r (seq.mrce F is exerted at an angle of elq(6csm r. z6$\theta$. 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 floor at constant4d2aw fq5180ysw kkwt speed by means of a force P as shown to the right. Whic4d 0k1wtwwsq2y85 kfah of the following must be true?

  99.08: A weight can baf zdb,j0ixf41 9tw j/e hung in any of the following four ways. In which case is 0it, b/df 9wza4jx f1jthe string most likely to break?

  96.39: Assume the objects in the followim10gv b51, sd4bigvm 0j 9me4ycvt a6qng diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to breavv4 c,i01vj g9 qd 1 bm56smm4ytg0ebak?

  16.10: A person wishes to accelerate an object upward uniformly. 1bu7iyc0 f5ej 9cb-gaWhich one of the following choices must be true of the force F, provided by the person onto the object? W represents the magnit-b5bc eyf9 1ic07guja ude 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-axisdk 9+l8 ,f.hzeybiax ., at one instant of time, the mass has position 2.z .fx, e8.ik+l bhady90 m, 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 on a rough c(ux9tw a.,fisurface by a horizontal force of 15 N at iuxw9cfa. (,s 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 rirtzy0 tn.8mo d.j:do 4ght is sliding to the right along the toj0d.nozym t8r. :4dfloor. 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 0.20. The box is moving with:

  00.32: A block rests on a q5. fmu a v8y ytsz0)iko(vt43flat 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 pulso8fg 0 8 kki* tjlo2:/9medzzled across a horizontal steel plate as shown in the do *z8 iel8mjo0/t:kz92 sdkfgiagram 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 inclineoub -70x grm+-zev+ly )fch2r that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increascrxe globy -hmrv7f z+)0u+2-ed. The magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block r7i94( phabsqm ests 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 90gj8m;87k/n c;sti ma6 u qmrb/ fnvfis significant) in inclined at the same angle, it wrtvm7sf u/cqb 6/am ; j9 if8nn8;m0kgill 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 planewg: k,2j-w;tm c.kokrs 6qk5e has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components o r,k2km:e 5gj6;.tk - skowwcqf 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 inclinu:3dwivzv su: t l 10-hkl(gq;ed 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 nor(l;3:dkuu:sqwvl-ivzg 1t h 0mal 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 constant speed of 5.u e:4ixg */ahy0 m/s straight up a flat sy:e/h4* au ixgurface 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 misxf 6awf4. .yqgplaced 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 q6agxwf.f.y4 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 o(,,ru5hwv+g l3 hx g:59esv3fuplkltf mass M is released from rest at the top of a frictionless 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. Durings fvtl3ge9p rw,l55:(uuv,h xgh3kl+ the slide, what is the magnitude of the normal force from the table on the incline?