96.30: An 800-kg elevator accelerates downwardu u;use*(r;sd 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 thegec)cvl lij/:(;w/am instant the elevator has a downwar cli gev/;c:)l/(aj wmd 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 bathroom scaler+6ya(o.r n/ v qn;are in the school’s elevator. When the scale read6e; oayna r/qv rr(n+.s 520 N, the elevator must be

  00.12: Astronauts in an orbiting 9y *igb it/vw36z2xcyppa ( g+space shuttle are “weightless” because

  06.16: A scientist in the Intzn+71qztp j5l4a5 d1 8vkmrxqernational Space Station experiences "weightlessness" be x+81lqpz7 z5mndjvq14atk r5 cause

  11.10: A string of negligible mass /w 2,kewkm2jznvz)kabr7t 8zxu 7j3 1 connects an object 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 eznkk1b2 jkmta7 7)e8v/x,r2uj ww3zz levator, 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 m hw+p 0y;ml*d-4*yyn ys5 g)nclo 4houass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acw0s n)mhu;cgy o **5pyy+hnl-4 dlo4yceleration 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 horizont.twv 5-s-ccd06c *dya4j4ychxaw1knmhe2*k al frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second stringad-cyh a-0c6 1jdxs*c4vw5tkek n4*cy m. h2w 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 frictionless surface a3 + bw )ttmr+eg5:o*( ios o)qwkapfz1re connected by a massless stri+ o5r)k(bf)oqats: twi*+1pez mwog 3ng 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 mass on a horizontal fricti9zcba z9q +a6( tg+ jhtm70swsn9gq9monless surface are connected by a masslessj g097z th96b+q(9wzg+ncssm9q at ma 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 horizontal frictpbt ic89 )87an; uggesionless surface. A 36 N constant f)8gcsap e8t;9 in7 guborce is applied to 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 i00at6 gvxd8f has a tension of 2.0 N. A force F acts in the direction shown to the right. Aagtf0v8ix6d 0 ssuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontakaq ku:7rx92ky zo u0cbd:o*+l 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 horizontal force pulls on the larger box, with wha9ukqrz20oob :c+ 7* akkdyx: ut force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in conhq;.r4w.jjg y tact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. Whatqj4. rjh;.yg w 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 otf)7 zo2 jidpmb 84(digher 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. Mass m accelo2( did imjbgfz4p87 )erates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and uunk 7q+qd9dn+eyvj f i(u)c:h54q dh13xh2s3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the ri+: iq xkqy3 chuv + eqd2nn)s91uh(4jd7h5dfught. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arrangetf z146 /nsmeikb4u lmya2 wg6k4vo 90d as shown in the diagram with m1 sliding s t nk6u62fb4vgz ey0 / wmao94kmi1l4along on a frictionless surface and m2 hanging from a light frictionless 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 mc*3 0etc cn3qskwv ry17d me88b09mtz isplaced 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 t e n ytrdv19*ec8s008m7cm3bqz w3ckaccelerate 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 acceleration up an incline. The box h 1o u v2+-(+ffo -,u a;avulnpjdrp6pias an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rvl a-vfru-u1;p6(+p + d2n,ifpjoua o est. 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 horizo do91jtn,)-bjil c ,rhntal surface. A constant horizontal force of mg/2 is appli-)9o h1cdb jntr,,li jed to 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 frictio*)guha kl s4e t7zhg(4nless incline has a gravitational force,a normal force from the incline, and a force applied byglh(ugt*k s74 4)eha z 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.