96.30: An 800-kg elevator accelerates downward aqytpqf:b4 i5.t$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student standuq 96m7/ 7a2bk kl wolvbu5.hes on a scale in an elevator. At the instant the elevator has a downward v 2 uw5l7 kekla 6.b9mqobhu/7acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 Nll7n :wuay2 2ozkf* b02*wgqt stands on a bathroom scale in the school’s elevator. When the scale reads 520 N, z*a2lwgy7w*o2 tl:bkqf u0n2the elevator must be

  00.12: Astronauts in an orbiting space shuttle a6jy3u bl n,tw3gj /h.yre “weightless” because

  06.16: A scientist in the International Space Station experiences "weightlessnes+n f;p7t (.k zdceamzgo);/epa1j7tjs" 7 fjgtp1t ;mzeoj/a)kca+e ( .npz7d;because

  11.10: A string of negligible mass connects an object fua.*ik v9 r 1lahc*p6of 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 in theplhk * 1vu6cf*.ira9 a 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 /iwj.omv-:jyyc) 7ec connects an object of mass M=10 kg to the ceiling of an elevatwe ic m-co7vj:yj./)yor. 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 frictionless ptuxr:dyi52 oiq6wa;d) 4 3ks surface are connected 36)d ; rx2u4isy:i oqwa5d tpkby 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 frictionless ;/: iz/odpw eep5+czcsurface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a cop :wdeo;ep cicz+5/z/nstant 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 frictionless surface wizwdex.9x *2p0 c3 dz/ fi+kqare connected by a massless string A. They are pulled horizontally i2qd.w/pxkief *czdwz 39x+0across 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 horizontalj.;xur 96u bm4n5zpfe frictionless surface. A 36 N constant force is applied to X as sh mzpb6n; jf54ex.9uur own to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are conn1acee /zx hdw.*-wqnl;0 f)qoected by a string which has a tension of 2.0 N. A force F acts in theze*qaleofqnd .ww )-h/1x ;0c direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horq dc a51tyo3ef/xoy/,4 gy 9swizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilograms. If a x5sa4g e/ q,c doy1f/yy3ow9t 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 frictionless horizontal surface2 k,s1izylp)i(p1mf4b w -xy b. A constant 35 N force is applied to the right onto block Y. W(112pizikxy, bp) 4lsyw-mbfhat is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the otf9/051p 2 hunu9,kj q ox//ucfoss cowher end is attached to a mass of 1.00 kg. The rope is hung over a masu oxsnos 2j u/u9h/ 0wqcpk9c1 fo,5/fsless 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 uqmo1 g(2wey 26fb8km3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is thb216 eufgk(omywm 82qe approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2 in3y7h 88eevt, are connected by a cord and arranged as shown in the de8n ih 83e7tvyiagram 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 were known?

  02.42: A small box of mass m isp1- :qjjgby.bi+a0fbrb e 04 .a etem2vlaced 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 all surfaces is μ , what would be thb bj jqar2+i4 e 0.b. g1-be:ytvmfea0e force accelerating the smaller mass?

  17.25: A box slides with uniform acceleranj:x* (0/ qlg qhp.nj0i8futd a8io ,*-rwzoy tion up an incline. The box has an initial speed of 9.0 m/sjg0oi u*r wa8il /q-df8yn:znp* oxjhq,.0 t( 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 horizontal r3hymuw8 l(q cgz +09vsurface. 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 aq09hgwuz(mrcl8 v y3+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 ,anyewulbz :/7gepx ;/z/j1oa 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 applibp;lxze1w/ :7u,/g o/anyez jed force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.