96.30: An 800-kg elevator accelerates bc4qnenl8 18oxe ld* 4downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student standsesjpb7( gzx5hs+)q/ ;ii gc3q on a scale in an elevator. At the instant the elevator gsip3xz(c );/ +7qgsehqijb 5 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.ncmy k8 cw*g/n;u 9gx N stands on a bathroom scale in the school’s elevator. When the scale reads 520 g*xw9kc 8. y;/ngcnmu N, the elevator must be

  00.12: Astronauts in an orbiting space shxc szcz 09z/gm/p (n .xucc:d-uttle are “weightless” because

  06.16: A scientist in the International Space Station experience+anhx g1,k1z c 71+2hporwizm s "weightlessnesszn1wi1hk+ 1,7xpormz + cg h2a" because

  11.10: A string of negligible mass connects an obgbd3kh+(o1,(zo guj 3bt:ni cject 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 in13t ob o: ,k(ug+cbdi z(gjnh3 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 ofkj5bpz.d / c u(0kk;ys*; alml mass M=10 kg to the ceiling of an elevator. The elevator expbk0 cp;(dmkyl a.k;/u lz *s5jeriences 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 frictionless surb.,x c*dofpt+yx1f 0rface are connected by a massless string A. p , dyx1 +0ftrfc*bxo.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 horizonta. 9kycoz5sva: l frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B wi5azv y.:osc 9kth 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 horihrbi+ vys502/7 rduxz zontal frictionless surface are connected by a massless string A. They are pulled horizontally a0 x 2/is5hd zbr7ryuv+cross 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 apyhz2a 9+6;g /+r uqt8xdmlol horizontal frictionless surface. A 36 N constant force is applied to X as shown to the rig9+ahulgy+o2t ;d mp8/6 xrz lqht. 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 wl-d*c v bk2h -ljid(szr7jo:k3at b t7k6fs8: hich has a tension of 2.0 N. A force*kc 3obdlb8tdsz :i- 7l2v6rk-akj(t:jh 7fs F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to4( 5z tnja3-cc ouz:mq the right on a frictionless horizontal 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 omc3: z(jq4tz c nauo-5n 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 ho;b sk :lu/+4r w;a:zrjnvo3qrrizontal surface. A constant 35 N force is applied to the rigrbao;;rj4wl: n rq+:s/k u3zvht onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope iqzv ,a.v,gi s779 gzbjs attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a za, bvgj9i7g,v7.s qz massless frictionless 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 over a friwn) b0jmprf8 lk)hs2;ctionless, massless pulley as shown to the ri) srmb8) fklp;wh j02nght. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connymvp +d y0d a3c-25okoected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging fr+3ocky ya p5vd0dom2-om 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 m isplaced on top ofmstb3b)6 c2z p ;zt-q:7m *sngdka4ut 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 accelerate to the right with the same acceleration. The coefficient of friction between all surfaces is μ , what would be the force accelerating mn;*2du)tb 3-zstb:a 6 tqc7gsmzp4kthe smaller mass?

  17.25: A box slides with uni9jpe,fqn; *qm form acceleration 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 th pqnqef 9j*;,me 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 horizontal surface7 a*w52q hg3h; gcqydb. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surf ghy5a* 7cq3bhq2wg;dace 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 a graviu20k j-a6* bdd dx1wrqtational 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 -ujx0 b*kd6ad12wr dqone 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.