96.30: An 800-kg elevator accelerates 2ko.zusy3p 4dqez ev,;e33rzuft . m8 downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands on a scale re c91,86yzvuef r1kw in an elevator. At the instant the elevator has a downwvz6rf 1erw eyu,9 k8c1ard acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 fk/ d u o.ehm+lbxc3 o/:++zykN stands on a bathroom scale in the school’s elevator. When the scale rhbz++k y/ :.eodf /l3uc+oxkmeads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless”)u aw 7+xh(p4new 2qxk because

  06.16: A scientist in the International Space Station experiences "weightlessnesyyuiq7i/7q fh:-lyl4;t4tj u s"th/f7i qlylui qj :7u44-;yyt because

  11.10: A string of negligible masx (,e)*bg :f ;r5srz lhz*e+7gbx ezbryk 3bc*s connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward speed of 3.0 m/s. Let Trepresent the magnitude of the force on the mass M by the string (tension), G represent z lbhr,*(ebrb)xy * :*fzc; zg 7x5es+eb 3rkgthe magnitude of the gravitational force by the Earth acting on the mass M hanging in the elevator, and F represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an objc/+ my4 zjflq*gt-:sject of mass M=10 kg to the ceiling ofmg/fl jt*c +:szq-4jy an elevator. The elevator experiences a constant downward acceleration of magnitude $6.0\; m/s^{2}$ . Let Trepresent the magnitude of the force by the string (tension) acting on the mass M, let G represent the magnitude of the gravitational force by the Earth acting on the mass M, and let F represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the relationships between these forces?

  03.06: A 2 kg mass and a 4 kg mass on a horizontal frictionles g-+ jequj-o vln2r,8w 8vq7tcs surface are connected by a massless string A. They are pulled horizontally across the surface by a slv8,qjw j2 rqt -8gu+ env7-ocecond string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horik0di 2kfo aa- n 6;e*k-xne)kp7ws lc-zontal frictionless surface are connected by a massless string A. They are pulled horizontallys)c*nx k;fanee-al- k d pk6 7o2-ki0w across the surface by a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the force of string A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionlesls*74 p owo-ztazqa+ 2dn 9i6is surface are connected by a massless zi qoi7t+da92nlw6pa*o-4 szstring A. They are pulled horizontally across the surface by a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the net force on the 2 kg mass?

  96.33 : Two blocks X andY a 3;kirbq)tm 5u:m2 0x1 of xtgogc4w;gre in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The forf1it5wor; )mx bgot: ;gkgqm2u 43xc0ce exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a strob 3w 37sk:pzaing which has a tension of 2.0 N. A force owaks:3b p37z F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal surfay7ftv; h g mlnj ha(,*ibpu)-,ce as shown. The larger box has am,nu ahpb;*g,)j-vfyi7 hlt( mass of 9 kilograms and the smaller box has a mass of 3 kilograms. If a 24 newton horizontal force pulls on the larger box, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andYr,fa -h.:o0 2wjx; :vvb udtjn are in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y.: :tvdn2fruoja0h, wxj v b-;. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the other end is c6ll)d9+i+fi b x5npp attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as sxpf+c ld6 9+i5pb)inlhown in the accompanying figure. Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses o) rewln+c xe(+f 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What l) n exe(+rw+cis the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 anz-kx6p u5ugk.-0 djkid m2, are connected by a cord and arranged as shown in the diagram with m1 sli-kpju-zx 0d6u 5.k kgiding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be the mass of the falling mass, m2, if both the sliding mass, m1, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced 5ubxdan r v0d9,: 6xwcon top of a larger box of mass 2m as shown in the diagram at right. When a force F is applied to the lwxr,c0xa9bd nd u: 56varge box, both boxes accelerate to the right with the same acceleration. The coefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box has ar(m frn(kye(dlswp2lj p) ct5f+(m85d (c yu 0n initial speed of 9.0 m/s and rises vertically 2.60 before cominlmnsuwm2y etp8 kfd5 (rrcyj+lf) ((c(0 p(5d g to rest. If the angle of the incline is$30^{\circ}$, what is the coefficient of kinetic friction between the box and the incline?

  05.44: A box of mass mis initx;,u*o-y ,k9ch yr rkb.8pg8 ebliy4vially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. Tbpcxyui ;, r9yy* ,o84e 8k-rvhk.lbg he coefficient of friction of the surface changes with the distance pushed as $μ = μ_0x$ where x is the distance from the initial location. For what distance is the box pushed until it returns to rest?

  15.24: A mass on a frictionlessi+eytp j x27zy o(yz;94aly-a incline has a gravitational force,a normal force from the incline, and a force applied by a personl (a io 7je y2-payxz9zyy+;4t that all are equal in magnitude. The mass remains at rest and the incline makes an angle θ counterclockwise from the horizontal. Which one of the following choices best describes the orientation of the applied force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.