96.30: An 800-kg elevator acceleratesv0 p8gyzg .rs5 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 elevato-*drna6jxl -uyx s :, pbt/br0r. At the instant the elevator hayj6n:r - 0 s/db,bxrl xta*-pus 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 weigh5evpzlzl)i kc5a5,i*j )t bc /0mki6qing 500 N stands on a bathroom scale in the school’s elevator. When the s*mv,q 5 )c/kj zze6)ctk0a5iiil 5plbcale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” be6nkawg9) k/ ;hlc*sppcause

  06.16: A scientist in the International Space Station experiences "g:utoc2pfwc;kb(l ee7 8 5w 9zweightlessness" b 7:u;wlk982 wpgbe5 ce(z fcotecause

  11.10: A string of negligible mass connects an object of mass 4)*cys.k r56 xv7x fi (cg9m xlay.fljM=10 kg to the ceiling of an elevator. The elevator experience7g6 s4(xc.9km xcj fv yxri5ay.*l)lfs 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 connects an object of mass M=10 kg tobzdh22i w)5qeqt c46z uz 8j8v the ceiling of an elevator. The elevator experiences a constant downward acceleration te6 qz 282dcq8bzzhiv ) jwu45of 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 surfauu/pr* j kjr, fe+b0 tc760pzvce are conner7 0f pkj0cp */t,rbej6 uuzv+cted by a massless string 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal,(u:5gw gx rsf)-9xz mnvb w3x frictionless surface are connectedxrv n,gs(x-w 9) xwbg:5z3 muf by a massless string 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 force of string A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mahg3 3p6kmevfa ro krv+z49z6-m( z( uhss on a horizontal frictionless surface are connectvpa-+rmkfz kh z h4r m(o369e vuzg(63ed by a massless string 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 are in contact on a horizobha7o8p:u wuk 9.nij2ntal frictionless surface. A 36 N constant force is applied to X as 8 o:wabj2hpn uku.7i9shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connectyrr630*d f0etjd3vf s ed by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is fe* strfr6v3d 30 jy0dnegligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a f .6 w.rybxn czr42z*fh; 7fn4yb.kskfrictionless horizontal surface as show;*nzknsr4 frk . yw6 7x 2b4f.f.zybchn. 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 are3rjv-yy(ys3)o ya 7+wy/lpe e in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the fovy /oyy3r3+)7 ye sw(-peylaj rce that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the otx *n2 q9 p3u5jq5yxovsboj4)v her end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown i)n5j4*29xbvvx3yjuoq5so qp n 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 y bb3d9e e;auk-zzr:*its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magni:*ydbe3b- ue9kzra;z tude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as show3 vnm:3xzx3so ;0mfs on in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be the mass m3 0:f 3s o;mz3nsxovxof 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 isplaced on top of a l31su,kjgmng/rm tw7 k-4 mlq( *q3yuz arger box of mass 2m as shown in the diagram at right. When a force F is applied to the large box, both boxes a7qmm3uyg/ns4wt 3r1k(q uzl,jmg k-* ccelerate 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 uniform accelera)tb2w2 lbxcvuw.0 b(j0*vm rq tion 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 angle of the incli2q0lt2 j0mx ) ubwv*rwb.c(b vne 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 surface. A consdpdx,ns674)ba e w+vp tant horizontal force of mg/2 is applied tasx4+e76vdw pp)n bd, o the box, directed 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 hkd rapmoj*q 0o./-0c*oocu;xas a gravitational force,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 ho oo-ku*oc;0d*ajx /rc0 p.qomrizontal. 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.