96.30: An 800-kg elev4l*)pns jln4q(aen / uator accelerates downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student standj 5 w4cwr8*nuzs on a scale in an elevator. At the instant the elevator has a downward acceleration of jwucn zw58r*4 $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N stands on a bathrh 9ofq1ae(mxjviy**(.y 7t eroom scale in the school’s elevator. When the scaye 7oeh1q i*rxvm( j(*t9fy. ale reads 520 N, the elevator must be

  00.12: Astronauts in an or02cige6+3mj t z* d;aj9he kujbiting space shuttle are “weightless” because

  06.16: A scientist in t/ o:m5owzemm v4d,8z the International Space Station experiences "weightlessness"wm,te58d4m v z/:mo zo because

  11.10: A string of negligible idygc3.d x *0b4 k,st9gn6nyj-sz .x-)ii xlj 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 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 relati6ix)*s jii3 lnx0dy .gbx kz,g9d.c4yj --stnonships between these forces?

  12.10: A string of negligible mass connects an ob6 +dr8ijh+buw5 t3h9 2z2ux ggth0suyz5+su qject of mass M=10 kg to the ceiling of5b rq23xh5h+jyit sd 6ghsg0ut2+ +uwuz u98z an elevator. 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 alyt576d6 av mtnd a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled hoymt5a6v td67l rizontally 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+ +wv52yecd v 4:iyyujl frictionless surface are connected by a massless string A. Theyidvcyvw+u 5ye j: 24y+ 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 4 kg mass on a horizontal frictionless surface are c ek3 /0yjvos.bonnected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant .vo03y kjb/esacceleration 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 surfafl(qhu+-)y s( sj6 fllce. A 36 N constantl+l6 j u-qfshf ys()(l 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 and 3.0 kg are cop 8hhp5)juq h7nnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to thhpp5 hj)uhq7 8e right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the 4 4pnlr+ 1ale3p7 3jemehlpf3wrk( l -right on a frictionless horizontal surface as shown. The 3nwk1l- p4jrr7 ee3lf mllhpp+ (a3 e4larger 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 box?

  17.15 : Two blocks X andY are in contact on a frictionless horizontal surfa))hg ll5 zv. c*l s;)gl*xurvvce. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X e5vhxv g;llusvrz.)l)*c l) g*xerts onto blockY?

  94.25: One end of a massless rope is attached to a(a :yjur/:2wzcb* ahl mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulle* ru:al(zh ca :wj/by2y 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 2fzy z:-k o2 2ld j:cpopwlx4kcf+y;.its ends is hung over a frictionless, mas ljo2z2c p:yc+ xflw-;p 4yok z2:d.kfsless 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 k(f zo).)eu7ggec 0 ihmz7g o.;el,uh 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 fale) mlh0oug .zci. ;)hg,u7 e(eof7z gkling 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 ispbi lc/gk6p wvz);dnl6 -agq9:laced 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 the force accelerating tig 9:;k/p -6b dqva6llwznc g)he smaller mass?

  17.25: A box slides with uniform acceleration up an inclinegaxq3w u 6)o+9i .zfa 2irkv+b. The box has an initial speed of 9.0 m/s and rises vertically 2.60aogri qb)26.3 + iv a9w+xkfuz 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 ress5z*+lwb u)5z g/i 4hm b,l8x+kpcd,b wi spa6t on a horizontal 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 pxp )ahsb s +ii4wmdkcwubb +l*,lz5g 8z5/6, 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 g2 1l;u2u p(tvppo1wf 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 onlv21 w o(2gf1uu ;pppte 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.