96.30: An 800-kg elevator accelerat02oo;g+(l /rv c4awx+ efxannsc 9h,t es 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 scale2;e6* s,pn kl 0fmjdzmk5zuy : in an elevator. At the instant the elevator has a downward acceleration of pzd6kk;j*mynm 0u s f2,5:ze l$1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N stanfl* w5g*3+o cl.rygfrds on a bathroom scale in the school’s elevator. When the scale reads 520 N, the elegr.*cfly 3*g+rwofl 5vator must be

  00.12: Astronauts in a l5x3v2q9tha/dp 0 8x 0jbnidvn orbiting space shuttle are “weightless” because

  06.16: A scientist in the Internat (fhwif;063l .k cncayional Space Station experiences "weightlessness" becaus0af c w3y; (.lcifk6nhe

  11.10: A string of negligible mass conneryp3. 8rwxb s7cts 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 r7 p .3bwx8srychoices describes the relationships between these forces?

  12.10: A string of negligible mass conz6c fl;g/y wv:; vnkr u15mg)tnects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnk:c)ytn6gum/ 1z5rw ; ;vgvfl itude $6.0\; m/s^{2}$ . 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 horizoc7x,mmk a :vq0 xmj)jusc/6/qntal frictionless surface are connected by a massless st)0kqaccxjmmsu7 x jm/vq,/: 6ring 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 s/sie9*4o6 k s2fnb(05l + wq7 ugfxllqcghg5 durface are connecf qc5+b ik 2sg q5 6ge d*wl0f7ng/s(h4oulxl9ted 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg , bsvyb/94l k(pm9slqmass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across thsqlpk 9 4s9vb /b,lmy(e 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 sur6m mu9+u qb o qx,kdqs+mrh2zsup)318face. A 36 N constant force is applied to X as shown to the right. The force exerted by X on3umqzumsoh ,6upm9kx+ 8sq r)b dq+12Y is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a string which ha );+w oxy-un jnssxx tb1v:7b3 (qvsb7s a tension of 2.0 N. A force F acts in the direction shown tous7b-)7y bwn+3v1; xn(xs b :oxjsqvt the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accv t)hcc t)/ bco7fdgpp5y/g 5m j(m.3celerated to the 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 themc)cgpoy/v chj )5/t5mg(tc df.pb73 smaller box?

  17.15 : Two blocks X andY are in.o;+f6swo x7l rpr3wn contact on a frictionless horizontal surface. A constant 35 N force is applied to the right r o;ww f6.rs3pln7o+xonto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless z+sx0 vnt*c k a0bfme+s gf).zo8 5sj;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 masz+00 c+s m 5.* en g;kfvtjz8aobs)fxssless 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 aho4piy fns,r 5ts5..tnd 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the appr5ithsfon r.,tys 54.poximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 anhex:0k 2(e0shylakt j;*x+ l) 7kdxwe d m2, are connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless s): we+e( xhskllh;ekak*02j0 d 7xxyt urface 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 isplaced on top of a larger box of w5m1f7g+up99lt x phzl:jl6w mass 2m as shown in the diagram at righ1hl fwgp x5j9l:6p l7 uz9+tmwt. 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 the smaller mass?

  17.25: A box slides withnk p vv.zsl4d7-.w; qj uniform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.6;vzv w47sk.dlp .j -qn0 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 spx.0 qyan gd4-1rdrn- dzgr(y3 tn.7g pbcu60 urface. 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 pu 6uprbdr(d 3 1c0gy 7-zpqn0 tnaygrdn-x.g.4shed 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 3 5i9yz2axu okgravitational 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 applied force by the person? The +x-axis is directed upwaa2zo95xyk3 i urd, parallel to the incline’s surface as shown in the figure.