07.10: Contact forces are examples of which of the fundamental forcesg q,w+p1hzoyv2*sgh gc ol/7 9?

  99.02: Which of the followin:l-b8d8 9 tdz)nhutzwg terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship b+t: aopqij *f3etween the mass of a number of rubber stoppers and their resulting weight on sp*i3oqj t+f: aome far-off 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 magnitn:2g (g 9jgwia* yp:ynude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from bloc2 gaj(:ypwggy9: nn*ik B?

  14.04: Three equal masses are suspendedpot h(*r v46 :tm*huhc from a classroom ceiling by a series of stringc mth 4h*:rp6t*v(huos as shown in the figure. Which string has the greatest tension?

  16.05: In the figure s hs.rck2vs axhj8)(6lobf 5tn 986zaohown, the mass m = 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 represeno f6knhbxjro2z va8t ca(ls9.sh8 65)ts the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated r csd+c06m:sghg:oh q8d p. b5with the following statement: “For small displacements of an object from equilibrium, there isg h :sdqb :gc0r5p.m+ods 8h6c a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted aagr /jz 1n 2+nv:cah*bt an angle of z:an ar*c/b2+ hg1nv j$\theta$. 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 rougo+ z we((a+ml:d blaew.- gr3sh horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must3wes((wml.al+ re+z abgo-d : be true?

  99.08: A weight can be hung in any of t/ d9-tk9 w 5bkbzrtkxfjrwdx8;96 4r fhe following four ways. In which case is the -xkdxwz9k5 tw9;btr8fr 4kj 9/ r bfd6string most likely to break?

  96.39: Assume the objwc6xe/ 2dpa*g ects in the following diagrams have equal mass and the strings holding them in place ar6gwpd/ e2acx* e identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upwar)+i:k luwqq,uev ar )/d 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 : aw)qv u+iq )uelk/r,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 instant of time, the m9 c50hn3)fnlratc9o i ass has position 2.0 m, velocity 3.0 m/s,and acceleratio h)c9nrf509lat cni3on $4.0\;m/s^{2}$ . 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 byo0ozzov;ktnb5;d60 j8 2 sfdi a horizontal force of 15 N as shown, during the push, the object accelerates undz;it 65o0;2n dok0bo vs f8zjiformly 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 icw3- i - a),*gobo1pe3 dwgljnn the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N n-io1l)jwpw*gea3d-go3,b cis 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 ond(xn 7rlapr 45 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 fir0xyoe1lx5d , q) ljdz0st pulled across a horizontal steel plate as shown in the 0xx odql50z)ydj,1 el 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 the h,kn8p4 qg mfxgn)9x2 horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static fx2 hmk8,x 4gfnq)9 gpnrictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle of,yk:/ g);ul 2cobpyg q+gp1cg $30^{\circ}$ 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 si ,9 tcxjq.hf.ignificant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What i,f h9j. xtqc.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 magnitude N 1/l7x9,xuk:a5 )swk gwx f2jcxw-j:yv 0 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 iskw2/:f:- 9 jucg,wklxy xs)j wxv5a7x 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 an2fbe :-- u03n7ypy zj,q- uiicaux5mq 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 the following choices represents correct relationships bet i fzj-uxin7y-3m -0uequaq:5c,bp2yween

  08.20: A person pushes a block of mass M=6,o jlu6dt o5j5.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclined 6j,lj 55oot ud$30^{\circ}$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 mask. yd*bi4a -wxxmi9h6t*tme5x(*nmt s 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 magnituit( *ma5.dy x9k t4mx* w6tn*e-imhxb de 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 tszg/+ukv 5 )ngop 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 slide, what is the magnitude of the normal force from the tabl+gz k /gnvs)u5e on the incline?