96.30: An 800-kg elevator accelerates downward ah*f.sswah , r,t$ 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 th mzn;hu2cg c+4c+cav 1e instant the elevator has a ccz cm4 a;1g2chn+uv+ downward acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 5-)plv tv*vjou b7o:h0 00 N stands on a bathroom scale in the school’s elevator. When the scaleop*:lvvb v7ht)u-0o j reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “w66zg wl3 (hxlpeightless” because

  06.16: A scientist in the International Spt1 .k v/qboqsi( .9syjace Station experiences "weightlessness" because9ojybqsks/1. .iq(vt

  11.10: A string of negligible mass connects an object of mass M=10 kg to the ceioagt q0 (xvml (f-y-j2ling 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 force acting on the mass M. Which one of the following choices describes the rela(-2jmol- (af t0gyqvxtionships between these forces?

  12.10: A string of negligible mass connects an object bf9 cgm /o)w+1gjoqv: of mass M=10 kg to the ceiling o+ogw1o)/ qmjv b:fgc 9f 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 hwi7)z1jr7 owm orizontal frictionless surface are connected by a massless string A. They aj1 )7orwz7wim re 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass anub 3e6-z*ksjxy;zh5j d a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surfu sehzbk-j 53;z6yx *jace 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 horizork9wcz i9 q;r q.lub)6 jdv.a3ntal frictionless surface are connected by a massless string 6 3r l wbqqv9k;duci)azrj.9.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 ared1qdjh.//n.1tpb q ed in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted b/p.qtdnj/q bd .edh11 y X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a st5;5+ ) ue afz-a/ktaa tvktqr.ring which has a tension of 2.0 N. A force F acts in the direct ef5ra+ a;q5ttuaa)v/z-k.tkion 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 hoa x:ou k6j pe8( hfwe/g/nt+sr(z m(b:rizontal surface as shown.xtre k+( :zgo8(jh//esm6pb f( a:uwn The larger box 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 frictionless horizontal shn (-vek/fe)zurface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the f )nevhz/fk- e(orce that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass c olut7.yo// 2ghsef(m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless 7 / (fyg2ust.lo/ coehfrictionless 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 kg on itth)u clv49l 5js ends is hung over a frictionless, massless pulley as shown to the right. What is the appth)95lju l4vc roximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connect5r 38zz hzqic+.g ckf*ed 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 theiz.h kg c*8fzqc35r+ z 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 on top of a larger box of mass 2m a3 pu;audi53 sl3w+ gbr(3g seqs shown in tg wa 3s g3li +(u3dub3;sep5rqhe 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 force accelerating the smaller mass?

  17.25: A box slides with unifcmav g9f3knj iwc;;+6 orm acceleration up an incline. The box has an initial speed of 9.0 m/s andvkj6i mc;a 3fn 9;+wgc 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 h i z4men*jl3yd x)y,akaz1 ::torizontal surface. A constant horizontal force of mg/2 is applied to the box, direct yni l3ya)x1e,tj*ma dz::zk4 ed 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 hasxvtg,x-y1cukaxwv 7a 23b+k0bqy 31 l a gravitational force,a normal force from the in2ctkxbw y1k3 b7qvgu -lx +x 3,y0v1aacline, 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 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.