96.30: An 800-kg elevator accelera5pk5 c2fkf 5r5yflpb 7vk-m c,tes downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student syo(.zli.4vpnqtd2mdg . -6 q dtands on a scale in an elevator. At the instant the elevator has a downwardpn-omq(dl gzd 6t .q24d vyi.. 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 N stands on a bat. r)/ofq 3udtkhroom scale in the school’s elevator. When the scale reads 520 N, the eleva)/od. kr tfuq3tor must be

  00.12: Astronauts in an orbiting space shuttle are “weightleq )nbez)702d d0cryj uv xq/)rw7sb1 uss” because

  06.16: A scientist in the International Space S ab1xu4u 6(kojtation experiences "weightlessness" because4 ku1buax6 jo(

  11.10: A string of negligible mass connects an object of mass M=10 kg to tkla;,m/ea xfj ,td9u +he 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 the 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 fox/+ ;el,tfmk ,uaa d9jrce 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 object of mass Ml n-f0omp( c.g5v-e mq=10 kg to the ceiling of an elevator. The elevator expepfc-m(o.0vmqg5n l e- riences 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 frictionless surface are r4q wzez1cpp;4fa; *tgx.5 yjconnected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accele;. zx p 4jre5gaytw;cp*f1z 4qration 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 horizonur e dp 03a 6,aqa-6akmsi4s6ptal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a6imsaa 6dpkp4- ur36a,as0qe 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 andqu7kx**/ grib2oe+ zw a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant b*xeu2o/ 7krzi+wg q*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 are in contact on a horizwweqa+n684 f0tt n2h, ryhx8 sx0bw-contal frictionless surface. A 36 N co +anqr8xwye x6 2nt8st0hb0hw,cf4w -nstant force is applied to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are co (w0pcf 4kl-szftx,8f nnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuminc8xff4w,s-t kp( zlf0g friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionleqxeg 8cx;cl8ew.t0it agzj70 +j8kl1ss horizontal surface as shown. The larger box g.;+a18wjt0t giz8 c x7xe80kqcljel has a 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 andY are in conta e.:a0bjk;nf tmjo(d +ct on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exeak(m.t d o;f0bnjj e:+rts onto blockY?

  94.25: One end of a masslesss*;ine1txn;u( z2ev/ s(/gie3 cv vkg rope is attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accompanying figure. Mass m accelerates downwa 2v;(uk i*vg ie svsztn;1x/(e3 g/cnerd at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3.0 kg on its ends is hung overy ; v8-x1bt7q:zgk,buhe w6bj a frictionless, massless pulley as shown tjuzh-1 tb8x;k7v6ewq ybb:g,o the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are ws 0i4+w n-v,zgqbj51m bw n(lconnected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be the mass of the falling m+qi 54 mjz,ns0ng1w ww-(bbv lass, m2, if both the sliding mass, m1, and the tension, T, in the cord were known?

  02.42: A small box of ma. /(nfs vkf) hohll0v 5c -lvsccj13q1ss m isplaced on top of a larger box of mass 2m as shown in the diagram at right. When a force F is applied to the large box, both boxes lcnfo5lqh)l1sj hvcsv k 10/(3 cfv-.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 withqaj *ckpfc460 uniform acceleration up an incline. The box has an initial kjfqp4c*0 a c6speed of 9.0 m/s and rises vertically 2.60 before coming 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 initially at rest on a horizon e,0z)jr5rxnx.+oyvntal surface. A constant horizontal force of mg/2 is applied to the box, 0 .rrx,vzyo+)jx n5e ndirected to the right. The 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 frictionless incline has awbj 2fao7oq: ifg1.8c/ nnh;n gravitational force,a normal force from the incline, and a force applied by a person that all are equal in magnitude. The mass remain72gc1qf nf b:;o a /nohin8w.js 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.