96.30: An 800-kg elevator accelerates downward j9 nk z(dd9- k1las6 2qktew-kat$ 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 the er0e atx76/e tblevator has a downward accelerati/ra0ettx 7e6 bon 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 scale in thv p9c9 exrv/ep6cye40 e school’s elevator. When the scale reads 520 N, the elcx0vpe /yp9ec9v 6 er4evator must be

  00.12: Astronauts in an orbiting b ynca.1et; wpqy7+ +uspace shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences "weqhhuov :qf..ul2h 4 knm4 +v,pw9 nsu:ightlessness" besu 9 4k4v:ohh,w+.nv qpf. :u2muqn lhcause

  11.10: A string of negl5p. 9kb(yjbu,mfohv + igible mass connects an object of mass M=10 kg to the ceipf+kbo,umy 5b(j v9h.ling 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 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 ,epy0kp2 9yjato the ceiling of an elevator. The elevator experiences a constant downward acceleration of magjpy20pa ,ek9 ynitude $6.0\; m/s^{2}$ . 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 surface are connl:u7 prv3dj b0ected by a massless string A. They rvb7: jd0ul p3are 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 hor6c3 wnx8n* mkv:5skzfizontal frictionless surface are connected by a massless string A. Thxc5m z8fk3n:wvk 6 ns*ey 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,;t(vtmuu,ta 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizon,tt;(,tuvmu atally 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 surfacedlj 6;hc 6wz*)eoj )rl. A 36 N constant force is applied to X as shown to the right. The force ex * who)rl;6j)ldzj6ce erted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a strinw- 7qt i7k67) ggf)xv,sfinlv g which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming fricti7fxg7gnf 6-kvwi q)) s7v t,ilon is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to he q;ilb ,ftbu37) 3rithe right on a frictionless horizontal surface as shown. The larger box has a mass of 9 kilograi3 3,lb);b iqhfretu7 ms 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 contact on a fric,8i)u*psdoi 25, cma ihmxw5s tionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the f d s,c*mmxo52 i,iaw5hi)p8us orce that block X exerts onto blockY?

  94.25: One end of a massless rope is attachedo n72z; uoys*r to a mass m; the other end is attached to a mass of 1.00 kg;oy2ouz sn*7r . The rope is hung over a 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 massl l,zjsr7 gz/gkr(+wu22sie+hi.z e): fi/ el es of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is th 2feii/+zgg:l+r,(z) u.srhw7iz klsejl e2/e approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, a x j5x,p1uyi.gdvqu4 1re connected by a cord and arranged 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 falling mass, m2, if both the sliding mass, m1, and the tension, T, in the cord weujqugvipx4d.5 y1x, 1re known?

  02.42: A small box of mass m isplaced on top of a lau+7f gj;y+n6q 5)wol ozrnx0wrger 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. Tho; 57w+nq6 z ju0g)lwxryo+fne 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. Ta -d9mxo2 -p)u2+na qvx6locihe box has an initial speed of 9.0 m/s adlop- ox2a)+q6x m uca v-i92nnd 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 (xueff*x: 8 tohorizontal surface. A constant horizontal 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 ae t8( ffoux*x:s $μ = μ_0x$ 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 grynhse ovd758 :avitational force,a normal force from the incline, and a force applied by a person that all are equal in magnn7 oehs:d v85yitude. 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.