96.30: An 800-kg elevator acceleratej,f2i: ky4dyhs 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 t h7iwda 9st9 -s+.lfeche instant the elevator has a downward acceleraws9at 9el h7f-csd.+i tion 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 bathe5c8j. ictrogv 3x+8uroom scale in the school’s elevator. When te3 x+o8v5 cur8i cg.jthe scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttxa8o 7wfvt4 g rw;3.zale are “weightless” because

  06.16: A scientist in the International Space Station experiences "weightr,;jo f5voss* lessness" be ;s5s*jvf ro,ocause

  11.10: A string of negligible mass connectsl ja,7 ,f:2bhi r:b--u;xbpt1khc fgz an object of mass M=10 kg to the ceiling of an elevator. The elev:7h f; ag1,ku rjltbx,hficb:2zp-- bator 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 ckz*5 5 28qn 2st6zgmzhlqt4 tu)kd:i oonnects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward accedh55)i28qkzmut 2o: stl zg*k4qzn6t leration 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 surface are qg,7b .6rdyfl connect ydq7.rgbfl,6ed by a massless 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal frictioqx:l.-eux5 g qnless surface are connected by a massless string A. They are pulled horizo.xxg5le:qq -u ntally 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 friw.pxiu+yk ; 9sctionless surface are connected by a massless string A. They are pulled horizontally across w ;u +.piksxy9the 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 surface.ertj4n0/mu:5u z3h upavmzz 580u(bf A 36 N cov/u8z5 5 0m4 bhut3pf0z(zur:m aj uennstant force 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 anf,87cdx ;z gjyd 3.0 kg are connected 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, wh x8gz,fyj7;c dat is the value
ofF?

  99.12: Two boxes are accelerated to t1blku/ovd/ja 6s8+lwkt +: f ohe 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 on the larger box, with what force does the larger box pull on the smaller bokb:aksfvolt w +/o d8jl/61+ ux?

  17.15 : Two blocks X y lohbe /u+/t8andY are in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude otbuy/he ol +/8f 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 i;vhxy0w9f6 q5*mrb l zs attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accompanymf 09* r5xlhb6vywq ;zing figure. Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with massesal1 xlga wd/4t;d) +an 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 the approximate magnitude of the acceleration of tnd1a4x w) tgdla/al ;+he masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arrange g3 ukcfn5+*8oebnuev1o9 u/h8o(r kid 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, eb/8k1uru+ig kvu(o n5o*fo93 n8ech 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 5egddqbtk(95 of mass 2m as shown in the diagram at right. When a force F is applied to the large box, both b q9ted5(kb5gdoxes accelerate 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 with2d+77l06b2-uu g e uyxzewzpk uniform acceleration up an incline. The box has an initial s u0e2z6g-y ku7xul+ 7pbewdz2 peed 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 initiallz sy r*bsa15g7y at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the bsbrs* 1ayg7z 5ox, 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 a gravitational forc1 htpf;+ly/jye,a normal force from the incline, and a force applied by a person that all are equal in magnitudep+tlj f yy;1/h. 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.