07.10: Contact forces are examples of which o 4zy: 3 6uw59cyvcvgkxf the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually tgk b ,7 g1qyu.sn6ale9o the others?

  02.20: The graph shows the relationship between thefa(*h/4 c(7au ytomou mass of a number of rubber stoppers and their resulting weight on some far-off planet.* /u( oco7f4 aaymhtu( The slope of the graph is a representation of the:

  10.15: Three blocks, labezvsy (f6uy0*kh)hpa3 led A,B, and C, remain at rest on a table. The magnitude of the gr )h3s*uzy6kp vhfa0(y avitational 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 massqxb2w1 u u.xe.pjh t7+es are suspended from a classroom ceiling by a series of strings as shown in the figuret u.peb+721.x w quhxj. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are stjulq5 b/b txd*e//. wxj8np9mationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?b/wq5xp9j/ .xtdn8em / u j*bl

  14.13: Which one of the following scientists is mosto z0330sg.a:ncox6fs rzsw;m associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force th;nszow.3 0a0 s6fz:omgrc3x sat is proportional to the displacement.”?

  94.26: As shown in t e+g8omoit dm,:w/c;xhe accompanying figure, a force F is exerted at an angle of 8g: m ,mectxw/io; od+$\theta$. 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 hok 8ce+9-iugqurizontal floor at constant speed by means of a force P as shown to the right. Which of the folek+qgcu8-iu9 lowing must be true?

  99.08: A weight can be hung in any of the followiq2 1bbal u,us1ng four ways. In which case is the string most likely to brs1 uq2 1a,bulbeak?

  96.39: Assume the obyr8k+ 8h)zt.d e5cj opjects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most liketp)kzh o+8 e8r.5djycly to break?

  16.10: A person wishes to accelerate an objepp (v5zihp) z)ct 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 gravitational force acting on the object. Ignore any effects 5hvz)pzi ) pp(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 6 - *zzb(f)cadr+yp eag)d7x xmass has position 2.0 m, velocit f- b y)pdd(xxzce7za*r+g)a6 y 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 snhu-zw p+3eq8 urface by a horizontal force of 15 -zn+whpe 8u3 q 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 riga)x zb5 mfks*(rp s3i6/bswo,ht is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic f,s5rs osx p)wi6bbk* mf/(az3riction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane inclined atikxi fx 5gih4f46jecr7hol2-qc *:m; 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 shown y68kd nx yz;y)in the diagram6ydzx)8y n y;k 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 makul0u y3o l6c7bes the 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 thlyu o7 3u6l0bce block

  01.11: A 5 kg block rests on vor:, fib,ix )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 is sie :f1.0otm7-niok ohm gnificant) in inclined at the same angle, it will begin to 0hteofk-o.m o1 :7nimaccelerate 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 force of magnitudjz9;v16z7cnb nm) kg ie N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational forc ;gm)7z61 z9cjinknvb e 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 inclined plo9 d)u*na2;9uyl/ ;bsfw 9xcnt/sf bcd(, xjpane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force jaw9 /;cn, tn x9 fs(lyfucbdus)p/9;x*2bdo 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 correct relationships between

  08.20: A person pushes a block of massm9(b5fiyynt kc6ul54 M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surftcb 4 6ymky5fli59(nuace 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 mk2 )worqwa*fz 2n,lb 7ue6k4hisplaced on an inclined plane of angle θ . When releasedrn) u2zofh ,e2ba 4lkkwq*67w, 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 best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest ati0 qd+dl:g9 5a)dshqd. 4ptei 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. During the slided5 9qtd id+sda4q0g lp: ie.)h, what is the magnitude of the normal force from the table on the incline?