96.30: An 800-kg elevatotll0t+u89cuu4udvb * r accelerates 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 an elevator. At the instan74x3f a tk3r 1kcik2eptsza5:1x lk1yt the elevator has a downward acceler 1e5a2xpt71ykkrc f14szax litk3k3:ation 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 sjshir rm wgq)cmy8ct50e 0 j :6(da:d3tands on a bathroom scale in the school’s elevator. When the sca0tg dwcmy qh::adc0m6 j(5j )8e sr3irle reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shyj (vkj-g 1p9)il0 0mtizj.se uttle are “weightless” because

  06.16: A scientist in the Internapdx j*4 tc(,rhtional Space Station experiences "weightlessness" cj*4(h , dtpxrbecause

  11.10: A string of negligible mass connects an object of mx ;;an-z1nv vmass 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 tv ;ax1zvn- m;nhe 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 conn zkw,dkrd/ bim 7-.(htects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnhrk7k./ d, (-dzm itwbitude $6.0\; m/s^{2}$ . 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 :a--ebq + :q /ebdkrczare connected by a massless string A. They are pulled horizontally across the surface b c:a/qezbd - e+qbr:-ky a second 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 mayd(.8+ mo , mrceayr4yss on a horizontal frictionless surface are connected by a massless string A. They are pulled horizonta+cemyy ,yd.4(8 a morrlly 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 frictionless surface ak8j uq1kk 0yd5 vy7m 5e)tbjm9re connected by a massless string A. They are pulled horizontally across the surface7 )tm1jy5 0kuyqvmk8 59kd bje 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 are in c jd lox .yx/8y.b)fr :bu*ttf.,m )fjyontact on a horizontal frictionless surface. A 36 N constant force is applied to/f)b.)l dy u tm jyxbrxyo:.*. 8tjff, 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 connected by a string which has 0r,w: 794owj2fn4glu06h/ygtjludyx * j mzla tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, what is the value w4fj,l 0 j /mwtg72:l490h6gdur*uyln xozyj
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontaef q-rq v 6w1t8z+p(ldl surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilograms. If a 24 newton horizonta t-6w8dpfzl(1 vqr+eql 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 frictionless horizontafw( bnd8klh;1lv g4m(p.i; sx+9p qi xl surface. A constant 35 N forceisql4kfp 8 (lhg;9pb (w;+i.n1x dx mv is applied to the right onto block Y. 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 is7 agf2*zz- .oitys0s5h efu .e attached to a mass of 1.00 kg. -*e.0ha sztsiezu57 ffg2. oyThe rope is hung over a massless frictionless pulley as shown in the accompanying figure. Mass 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 z* -vgsg+ics v4rsl;; i 3rqc)kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the massesg*l s rv;;c-s43 g+c)rv sziiq?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as showysqkj5f 5m8d/ n in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light friction5/ f5j8dqymksless 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 isplacn brcg785p2oq ed 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 accelerate to the right with the same acceleration. The coefficient of friction between all surfaces is μ5rcbg o2n pq87 , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box 6ke13a 1n c+akco6guxhas an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of theo3ank x61uaec g16c k+ 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 horizontal surfacejc opooo0 )xp 2*3xm zc,z+ux5. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient0u+5* x ) omozx2po,xzjc3opc 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 f4f/w9r4 g,xa. twtr nxrictionless incline has a gravitational force,a normal force from the incline, and a force applied by a person that al/n,9g. t44wwr axr tfxl 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.