96.30: An 800-kg elevator accelerates downwa:mhiv *)vw rv(rd 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 instant txxk5ke xb)x i :)k7lf/he elevl7fi/kxbk5 )e ) x:xxkator has a 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 500 N stands on a batv y+.xl x6/nivg r4)l6ahrz2joxr+, vhroom scale in the school’s elevator. When the scale reads 52i . hjayo lv+xrnx,6vxzg+v24/ )6r lr0 N, the elevator must be

  00.12: Astronauts in an orbiting h (elyj4b;v0 ewa ryi0xdrz7/ d9h9z3space shuttle are “weightless” because

  06.16: A scientist in the International Space Stq :fc*km ;7wpjation experiences "weightlessness" bemc7k*;:wpfq j cause

  11.10: A string of negligible mass connects an ob10l/nqx:g*20 l zk/;che bx, u zhqrtuject 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 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 forcu:uk*/10q zhzc /hgtr llxq e;,bxn 20e 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 gg)r u18 k hcbu-eeo;;z;fr-a6hozv) object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downw1 -h6ou)z f8vebg rk oz;-;gcr eah)u;ard 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 horizow m96tp:gq icsc 2btbyj/f7 r*m.8i8d ntal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accelerat76pd*8j.yrb/f9 2tmsc i qm twci:8gbion 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 cgl,h8mput8 x,nt, o+ 2)s qpza horizontal frictionless surface are connected by a massless string A. They a2p , moc+qptzu,s t8, gx)8nlhre 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass zfckz n *30t*oon 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 acceleratio n oz3zkf*ct0*n 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 surfaci/ ++zhc; z: eqqgow1ze. A 36 N constant force is applied to X as shown to the right. The force exerted by X onY isq +q1zczo;w :eh/g zi+:

  97.31: Two blocks of m*ml;ehg(ga/u ass 1.0 kg and 3.0 kg are connected by a string which has a tensiu (/* emaggh;lon of 2.0 N. A force 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 hkhd*c tfd3zm*;/d; qv6oqtezl8-u,g 4 wxs m,orizontal surface as shown. The largef6 xce3mdstoumt,;84,gvd hqq*kl-d w;zz/*r 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 frictioc6 iup e.u(k2qssxrv 2 2cn22sq ,7lpynless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that blocs2sspu l2xirn .qv2 e (6cqp2u,c27y kk X exerts onto blockY?

  94.25: One end of a massless rope is ae 5l uk:d*yoch0mx8+pttached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless f*cxh0+u:do 8melky5p rictionless 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 a7oo, ww4k7 vt+i:pxion its ends is hung over a frictionless, massless pulley as shown to the right. What is the appx+voip ok:a7w4,7 tiwroximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged 1p tzo) z xsbpjv;z 7,qqu8/n.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 tzb,zo8sz;qn x) puq /tv7 1pj.he 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 ow:sre0ah 8kf jbvs:) 4f 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 :sav j w0r8hek :4f)sbacceleration. 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 an9v ekqy4 :b2q:gn3vdh ou)g .d incline. The box has an initial 3b 9 yqe :qhkd:o v.4dv)2gungspeed 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 horizonktwxe3(3yx 0 btal 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 di(kbey w3x03tx stance 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 a gravitational force,a normal f*3*cxdba ouf.n0 t:zmorce 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 orientation of the applied force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown ic*m an0.fzo:* dxbt 3un the figure.