96.30: An 800-kg elevator accelerc qsd 6rf9(x1sates 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 in a+ 1gj zjpjzh)-n elevator. At the instant the elevator has a downward accelerati gjjz- pzh)j1+on 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 bathroom scale in the school’s elevadey6ag*x8qjx)m ) o0m tor. When the scale reads 520 N, the elevatm oa80*d)6eg)xxjymq or must be

  00.12: Astronauts inw)ph2c 3) cwgx an orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Spa9v -r5v hygs,gcxp(*tce Station experiences "weightlessness" beca9cg ( hv-xgv,5ryst p*use

  11.10: A string of ne vgnrxj ,wfr5o0m) /c-gligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevmx c5/-),0gnfr vorjwator 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 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 connectzbwn7p+rq6t-v e )q)ys an object of mass M=10 kg to the ceiling of an elevator. The-qz7 ebyqvp+n6w)t )r 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;1 wykf( -jxj 0vnlay;vxfrfm 1g 1.h- 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. fx11 mx 1afwkrn ;j0;yy--vjfh(vg l 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 horizontal frictionless sur7ne/myw2 /dgz 0t3nbjface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration of j7 30/y mwn2enbgdt/ z$12\; m/s^{2}$ .
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 m1cqnw 3 :yrou3ass 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 accelera:3wu c1nrq oy3tion 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 horizontal frictionless suf nltope -97749eq ezq d5m/usrface. A 36 N constant force is applied to X as shown to the right. The f 9q7on mfe 7se4q59zpu-tl de/orce exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0cymrg7 qi* . uj-*pk4c kg are connected by a string which has a tension of 2.0 N. A force F acts in the direc-irc upcqjmg4*y. * k7tion shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accabvk0u0 2l. q vb+kj y slay9j0sq2z;(elerated to the right on a frictionless horizontal surface as shown. The larger box 0 b9k2a.avjqk(zs 0sl;+yb0l jyv2qu 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 contact on a frictiw ssw4uygr,st5u0 28zonless 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 exert8yu0zrg ,stu w54wss 2s onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the other fx /n*c6m cz41b*odoi 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. Moz/ *xo1b4c6* df icnmass m accelerates downward 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 *;, pchcp6ba1-b7dw n (sm 1oi x0.rexeb0pueis hung over a frictionless, massless pulley as shown to spd17r wceuie bh.axmo b* (bn;c,p-0p1xe60 the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as showjq kf*4;xnsc1l s6)den 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 fallin)x;*snl1c dkf 6 4jesqg 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 on top of a larger box 21 l,vsqeo(w sof mass 2m as shown in the diagram at right. When a force F is applied to the large box, both boxes accelerate to the right with the same acceleration. The coefficient of friction between all surfaces is μ , what would be the f ve2os, qswl(1orce accelerating the smaller mass?

  17.25: A box slides with uniform g5n8fbarlkk-8e)m j.acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the anglnk8 rkame jgf5b)-l8.e 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 hoy,vp8sv0dc*l-11i 7ptyza;df ysum -rizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the distance push-1vpap yv ctl-,0sds u1* yy8 i;f7mzded 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 a gravitational fo ;qr(0g6 q/hlp kx*affrce,a normal force from the incline, and a force applied by a person 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 orie r /;gqla 6hkf0fp(*xqntation of the applied force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.