96.30: An 800-kg elevator accelerates dowv4r gc m,s(5dhnward 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 a wekw )fd8*(ban elevator. At the instant the elevator has a downward acceleratio(e8ka w*)bwdf n 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 bathrk)5(pygzrl ac99:8zh6wapd f oom scale in the school’s elevator. When the scal(96c) :zh z5f9apar lk8ygwpde reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” 13.)enpk p.:olr qldbbecause

  06.16: A scientist in the Intersn7,g1k- 5e+pa/vqyz4wf(wom rtw y0national Space Station experiences "weightlessness" becau 5a/r7sytm 4e,1 -kn (og0 wywzqvf+wpse

  11.10: A string of negligiblyrb d49rzh+fk1n /ljv*3uhjf01 p vx/e mass 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 thehf3v9p1vjd hy 1br/*flzn + 0u x4/jrk 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 masydmr6(rh(r +fs connects an object of mass M=10 kg to the ceiling of an elevator. The elevator rr hy m(+r6d(fexperiences 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 sua,4pexd283xkh5rp d dkql d4*rface are connected by a massless strin3lexa h 5*4k4x8 ,d2kddqdr ppg 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 k5 )9uhvp vn8y9-blrp mg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizovp9p lyv)u5r b8 m-h9nntally 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 fris.3h ajt ac5rqy5.n6zzr 6x x+ctionless surface are connected by a massless string A. They arq6. at65c5 3syhrzj.nrx + xzae 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 horizond0w3wt c1c1-ygj o +r:mskap )tal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X) 3w+akr :pcjt0cys11om-gwd onY is:

  97.31: Two blocks of mass 1.08pogdbwy )dp *,bow q0,inaf 9 puns-2g;wp1+ kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in sdpb;)ud + -f,q1gy wn 9n oi ap08wwo*,2gppbthe direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are a+ ihc 4/xmhni1lx7ohd u02t-vccelerated to the right on a frictionless horizontal surface as shown. The larger box has a mass of 9 kiloxtc7-/huhdmh x vl i4in+201ograms 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 cox7xvb*n: y is:b( -y).2dj mkiqbhwp,ntact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockY:xq*x2 h(.div )7n, :b b wpyskmiy-bj?

  94.25: One end of a masslessdt89lj*ad po,yx. -qb rope is attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless fricqbp j*, -da8txoy.9ldtionless 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 rs+ ntzu em/pa+a55 )tover a frictionless, ma 5+ta+5ut namp)rsze/ssless pulley as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as su-ge2(ox) zyf ;qf j.vhown 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 th(2eg zxy)o-fujvf ; q.e 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 ( 3smylj1nq ;1jz: wpclefw282t5ezb 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 accelerate to the right with the same acceleration. The coefficient of friction between a1t8yq3;lw lsz2: 5 e2jefw ( cpnjbm1zll surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. s(95rvx wosg4.7s s gsi5go8z The box has an initial speed of 9.0 m/s and rises vertically 2.60 before como5gg (s 4s sg5vw9s.x rsioz87ing 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 horiz6wnr -9p1dla iontal surface. A constant horizonri1 -w6nd 9lpatal 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 inclinka+apo1u9 mr s98nw7k53ox fhe has a gravitational force,a normal force from the incxuh o8n fraap+3 1k57mo wsk99line, 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 in the figure.