96.30: An 800-kg elevator accelerates z ;g 8ncsvv7b8downward 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 the instant the elev3oq mvx20m2* reof997mjlh; ycjokq* ator has a downward acceleration ofjhoe*of9 7 9q;lv xym30 *2jrmkomc2q $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N stands on d7qdxav 0j jek f4ys5 e2,bk,)a bathroom scale in the school’s elevator. When the scale reads 520 N, thkjyqv,j,ddek7se50 ) bf42 xa e elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” becaus;x+ psq ,cc8*qodz *k wovrb,7e

  06.16: A scientist in u- mdupsqrq5kq4.q40 the International Space Station experiences "weightlessness" becau4s d.5q4kuqmp0 -urqqse

  11.10: A string of negligible mass connects an object of mass sn:fuho9d3nrzp++zc 7;ie : gM=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 re 7sp9; z+u:ncgnzf +:3i hdothe mass M. Which one of the following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an kjg, ufp66;al :lv)5 lbtgt+z object of mass M=10 kg to the ceiling of an elevator. The elevator j6ktlt)vlzpg+ubfl ,5 ag;:6experiences 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 (z/a+;o83sdhf: j0 l rcu yfgwif+lh-horizontal frictionless surface are conne +gla+jfu(csh:0fwfy; 3ih z8-/o rdlcted 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 horizontali dn9fi* :rp)drg. k,7k)pjix frictionless surface are connected by a massless string A. They are pulled horizontally ax*7: rgpkki,i)df ) dr9 .injpcross 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 fr84oc) f9udzf 3:) u+iliclaeeictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a consz cu8:eadiuc3e4 +)fiof)l 9ltant 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 ce/ 1lelt(:bdo ontact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X onYoel :ltbd1/e( is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected 6q g2a)v48;fsm lh:kvmtly) nby 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, what is they v4m8;as 2q)kl mg)l6fvnt :h value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionlesshto 5(2s lw ltm8j*so9 horizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of9st5oolwtlh mj 82(s* 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 frictionle7vl6kuen/az9gc)az +ss horizontal surface. A constant 35 N force )/ ev +gnlk7 ca6z9uazis applied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a m-0x k i9 m-.u.7k;nsoksd-hyftn h/s aass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless f- y ok ;kinhsm79auk s/x ht-.0ds.-nfrictionless 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 o; ,n 39vim-:rc kqbipyzlgp5 6f 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as showngrmc;pzn3yb pi9vk -q5:li,6 to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 andq)pj5zhvugau;j o1;o7*19rc)ja dj c m2, are connected by a cord and arranged as shown in the d z;j9;1jjooh jg p)udq5v)a1c a7rc u*iagram 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 isp syft*fci0 .zcm)y2 ;hlaced on top of a larger box of mass 2m as shown in the diagram.sy 20yfczm f*);hcti 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 the smaller mass?

  17.25: A box slides with uniform acceleration up an inclinem) 5ptoj) cxizi4u+)i. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the anpjo4mz)xc it ii5)u) +gle 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 :z;gc3mx,4pd, f7caosr xfe 1 initially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of frictionxx mc13:7afgdc4,,;s eopzrf 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 incey/wy wm t,d+8line has a 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 applied force by the person? The +x-axis is directed e8 ywtd,m/y+w upward, parallel to the incline’s surface as shown in the figure.