96.30: An 800-kg elevator accelerates csh8 +yy f.(g7hknx;vp5 xmpv46k+pw 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 instant thd4 f dyj*c.pyhw4sg85+f5 rmqe elevator dm wh5 gs8cf 5jp*fd4q.yry4+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 bathroom scalim-qg7 s8 .+eu9iy ,zfd*ul tx)sexz3e in the school’s elevator. When the +-7iqszs d)uyezmi l9x*.xue,f 8t 3gscale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting spa5;oaf,epyj b :)nk2 kpce shuttle are “weightless” because

  06.16: A scientist in the International Space Statio5eggaa 8h+vaa5 +4 :jfddh ld)n experiences "weightlessness" b:v lh+8+ eh45aagadgdfd)j5 aecause

  11.10: A string of negligible mass connects an object of mass M=10 kg to -b5u8a od xu8rthe ceiling of an elevator. The elevator experiences a constant downward speed of 3.0 m/s. Let Tre x5 a8ubdu-o8rpresent 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 coj8)v/azpoyt ;;l d2vd nnects an object of mass M=10 kg to the ceiling of an zv2 8/l yv;dt)aop d;jelevator. 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 horizontal frictionlesst leyywvf d7. a443c6g6yy qa; surface are connected by a massless string A. They are pulled horizontally across the surface by a second str;wlty.7e36ya 6 fa4dcy 4gqy ving 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 hori,zg6* o+bmbp .)xly bczontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accelerat)yxz b,. gc mop+6b*blion 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 are bkluv*6fovq o p7 y :vtl**j.+connected by a massless strinl. q+o kf*jl*pvt*b v6vou7 y:g 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 frictionless zn r (5 cyro:fjg04p:rsurface. A 36 N constant force is applier(ozc0 45gf: jnr :yprd 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 con da*) f0txb 0s/*-wz 2jbg7li l0egilrnected 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 negligible, what isl b/sgx g02lij *iw0-dfla0rtb ze)7* the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal su*lt j )lq:o19v wkd;rarface 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 boxk*dajql l9v; t):ro1 w, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are ia;2: im x3ip z0xgd6hmn contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitmg m0p3adz h2 6iix;x:ude 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 is amppmep7:*v2a; obb ott4lmo2cf2 ; /ettached to a mass of 1.00 kg. The rope is hung over a massless fricti4 a2lcet pp;; *ptm72o/:mmbfo bo2evonless 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 its ends is hung ovey7hn2f:6mzg fs- 3e ubr a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the masses6 f3:7uhbzs2mgyne-f ?

  02.36: Two masses, m1 and m2, are connected by a cord and arrantj.k3 l+ zbxtci k32v evsu8-:ged 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 the +zkttc- k2e3 v x3j:v8.ilbsufalling 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 le9p qumbiw 4+);tf n/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 cfuqp/w+)4nli9m ;b te oefficient 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 has an inix-le, *u;sewdtial speedwexe;,- slu* d 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 horizonta28dfmzn ps x.6l surface. A constant hor 6xf8n. smdpz2izontal force of mg/2 is applied 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 frictionless incline has 8jv8g2d 0tpo* k-umvsa 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 horizontal. Which one of the following choices best describes the orientation of the applied force by the perso*v otm8 g-2dsp8v u0kjn? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.