96.30: An 800-kg elevator accelerates downward a )-rnobi0t-qwvp ih39t$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands on a xqg0iz n k+6w/scale in an elevator. At the instant the elevator has a downward acceler z6kw0inqx+ /gation 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 bath0etui9 )n yn,k6;m mehroom scale in the school’s elevator. When the scale reads 520 N, thyei6mnnm 9kt0 e,uh);e elevator must be

  00.12: Astronauts in j4(a86fmez/1 vpa(kkq 4zxofan orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences "weightan3 xvb qdtb9p984q1klessnessvdtx91 bb3qq8 knap94" because

  11.10: A string of negligible mass connects an object of mass M1 3* mwhxrec2n=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 rex3mr h*21 ncwepresent 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 negls4kqxsl8 b2(w igible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnituw8 ssx( q4k2blde $6.0\; m/s^{2}$ . 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 amrovzv :/,1pxx) g(qykgl1i1 horizontal frictionless surface are connected by a massless string A. They are pulled horizonxlg)vzv 1i, /k(rpgmyx11 oq:tally 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 andivx57;:p m)d s(kyflg* rej 5t a 4 kg mass on a horizontal frictionless surface are connectk 5( 5tp7elx*sf)rmy j gdi:v;ed 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 mass on a horizontal frictionless surface /s 5b+6qyob ofnz/t: ware connected by a massless string A. They swb/b5/6yoz +tq :on fare 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact on a horizontal frictionlei b3t7 dypr ;sx)8 k3glxg0:1fvs(sid ss surface. A 36 N constant force is applied to X as shown to the right.dsg: 3dv ; (yxg7fi)1ls3t0x8pbisr k The force exerted by X onY is:

  97.31: Two blocks of mass 1.0+h tt+lp 03 mk86akfo-ng8nys kg and 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. Ass0f s+ttmg o ylha-n83+p86nk kuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionlet 9g b1l:d-(c-gq uno0tj7lesss 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 2 jnlte(dgu-79glqo 1-ct b:0s4 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 frict(bxb-ms 5;jg wionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto block(bjxs;m5- wbgY?

  94.25: One end of a massless rope is attachedtn3z bcjq9j1/ to a mass m; the other end is attached to a mass of 1.00 kg. The rope bj c/ztn9q13 jis hung over a massless 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 3.0 v4b ,k/k 0nz sk/viu s(:ey/elkg on its ends is hung over a frictionless, massless pulley ak (vbek,/40ie/y lksun z:/vss 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 cordhbl bhz*h+,bsv,wox 9:o x;zq ;)6omf and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. Whhb9m + *zhl owx,:)qsxo; ;6bhv,zfb oat 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 boa7hziyee;we6 1+ eb. ax 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 forc7ywa1eez e+a6;iebh .e accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box hasjo *o/bpeq s( vo0w2;pu+ rnd0 an initial speed of 9.0 m/s and rises vertically 2.60 before comi0;q(pvu o+no0o bp/j2*rd ewsng 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 fd8ir/br3m m:j 2 8wqeat rest on a horizontal surface. A constant horizontal force of mg/2 is applie8: i2/e rrq38mbfdmw jd to the box, 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 gravitincn,* - , cksbzo(gatwr9/8jusp/k*ational force,a normal force from the incline, and a go rianc 8b pk s*nuwzj*9sct//,,k(-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 upward, parallel to the incline’s surface as shown in the figure.