07.10: Contact forcebvkg(6v: ,qvsif a.p(plas7oh 1 m3n7x( p0ezs are examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the otherss(6a s x.d- bpv04zfhr)m edl1?

  02.20: The graph shows the relationship betwsuxi7w/4 ei 8meen the mass of a number of rubber stoppers and their/i xims w4e87u resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at /1m ls3x+ho b;/qlhlvrest on a table. The magnitude of the gravitational force on each block is is; b/ll/q h3mv1+hoxlndicated 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 classroom ceili7u0i(gep .svh ng by a series of strings as shown in the figure. Whic.0 igvspe( 7huh string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the m wdk6 8chrjl;nji:t2 8s cy/.kass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the stringcn 8: r kd6lhwy8tc k/sj;i.j2 connecting the masses?

  14.13: Which one of the following scientists is most associated v 5n1nlu2q z8jcrah 25with the following statement: “For small displacements of an object from equilibr58lnjc a2 q5rvzn1h2uium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the acca;lhxuv*; :ee d+s vih dg/9b,ompanying figure, a force F is exerted at an angle of ;b9 vx*; vu /ea+l:,geidsdhh$\theta$. 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 2 90-kh1 ia.6szzzt cbaxgec0b,w(clconstant spice6x,c-.20cs z zgabw t19l bhka0z(eed by means of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which case y-bwik.f*b*3 7f(sw d9fks hu is the strin7-9ud3.fs*w (ffwk*bibk y s hg most likely to break?

  96.39: Assume the objects in the following diagrams hm8w* ui aek2r.ave equal mass and the strings holding them in place are identical. In which case woul wre*m.2 ikau8d the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whi 7esi0f*;q5 pjj/f(z f6iiubs ch 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 gr6e*i;0f5fi j sfipsjq7u z(/bavitational 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 instatk4;lr78 pas wnt of time, the mass has position 2.0 m, velocity 3.0 m/s,ak t84wa;sr7lp nd 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 objec lb8-a* d5g.pm8e 0k3qdyl 1gd4nevmyt is pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uni58y 3n db. 0ggk4 lmeqa-v*l1 d8epmdyformly 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 sliding joablp,hj 4p-bw;a 6,to the right along the floor. A horizontal force of 1bwjopp,l b-,jaa6h; 4 0.0 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 a8 kx8dz7k p(mzpws3q0 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 first pulle72cx hm;u0h os e--tu3g,pcadd across a horizontal steel plate as shown in the diagram Ah s7uax0;uh-2e-t m3,cgd poc .
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 horizonta4yxr8cqaqq*)ttj(/ntr w 3a. .zbn i)l. The block remains ati qx)zntj.anw*q3/t c 4ry .b)raqt8( rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests ofhe 8oig 59h+zn 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 spyt.+/rf ,u7 iyxh(ja second plane (where friction is significant) in inclined at the same a yi7jx+(/rust ,yh.pf ngle, it will 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 plane zz7s6 jfr/b y4has a gravitational force 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 the incline’s surf4j76fz/ rszb yace while the x-axis is parallel to the inclined surface.

  15.13: An object is beimp/ ji r*3r 1,rwlntc/w-d uo9t r(i1v(r (cgong pushed at constant speed on an inclined plane. The free body diagram of the objectc v,*1w(t3 rcpi9o/o-mrg ( r(tjld1w in/rur 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 between

  08.20: A person pushes a block of mass M=6.0 kg with a ce9kw 6 aiyhb3a32yy6pu 2 p2wyonstant speed of 5.0 m/s straight up a flypuae6wwyi2b y 63h9 2ykpa 23at surface 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 misplaced on an inclined plane of angle θ . Whh w236of;y lanen 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 t2 l6f3h;yano whe 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 eghed609l9 p6 ak xpb;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. During the slide, what is the magnitude of the norma6e ;ahg x e90bkpp9d6ll force from the table on the incline?