96.30: An 800-kg elewd+2+ bauw-k tvator accelerates 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 scale in an elevator. At the instant the8jv(zel 7 +r -q6vb/of7 b/evikwl/ag elevator has a d7q/ kbzv(vrvbejo l-7+a /l6iw8/f geownward acceleration 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 6-oasfm/ r:yix(yw.ui 2n) qhon a bathroom scale in the school’s elevator. When the scaloy. i2inf-m u6ry(:sqah xw)/e reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” ber9u9u cx9fuw 3cause

  06.16: A scientist in the International Space Statrg 9xy,19ox6 6f yclxzion experiences "weightlessness"yz,r69fg xx1l6oy9xc because

  11.10: A string of negligible masshc5 bo ,lf3xcl9o8 hf8 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 c bo8 9fxh,c8lol53 hfthe 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 relationships between these forces?

  12.10: A string of negligible mass connects irj 41;f4 y+gv)lh14vz.ynajsg5iuu an object of mass M=10 kg to the ceiling of an elevator. The elevator experiencef)1 j4v4grl 4h.ziag 1u+nsu yjy5; ivs 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 surfiuspv,nu1 k4(z-cv ;bace are connected by a masslessc4 vzu;1 s-p,b( vuikn 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 frictionl,xc0qsf:p io 8-owbns5 m ld+6ess surface are connected by a massless string A. They are -6l:xd05 w+cm i8,oqbspsfon 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 ho88/9 u d6jwga. fty1l. dfoq3s.jw tko4zsh y:rizontal frictionless surface are connected by a ms8ak6 .dh9/j4u :wj.tg.f13fs8 doz l wtyoyqassless 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact ooc pkm //s*yg7n a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by/*op g7ksym/c X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a string w24sn6f.lfqpmq7 v .bo hich has a tension of 2.0 N. A force F acts in the directio fn qolb 4q2mv.fsp6.7n 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 horueg ql2f: :-:0hhj pjfizontal surface as shown. The larger box has a mass of 9 kilograms and thefh fjp-u::2ljeh g0:q 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 )ara8fn e 87m/o ml0dthv+lv6wm )o7asurface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force tha)o7me)/v8 dmvt 6fnlmh7+ aalw 0or8 at block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a massaese4k/57 cd5 p:3brxma4o *a dyw2zl m; the other end is attached to a mass of 1.00 kg. The rope bco4ky4spe:ld *damar5 e 3 /52x7wazis 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 kg on its ends is hu,x:9c +hj 5a kn-9lqimkrm2t (0ewqvv ng over a frictionless, massless pulley as shown to the rightelq9m +v0xkqj (,nrv k cm5h:at 92-wi. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 l 6e.8p nl,kjuand m2, are connected by a cord and arranged as shown in the diagram with m1 slidlj86 ln k,ue.ping 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 isplaced on top of a larger box of m/dzb*5e)erh p ass 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 accel/ zre)eb5* pdherating the smaller mass?

  17.25: A box slides with uniform acceler6z)ocv l 8ae7ihdu4iws c,c/9ation up an incline. The box has an initiaccol)c7v i/dw9ziu ,46ae 8hsl speed of 9.0 m/s 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 horizos0 x-k,+if +w77y mqw tvtw+cmntal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coef,t+ s+c0vq7t fxmkw wy mi+7w-ficient 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 gravitational force,a nj u3tf+* dcyxr3wch 7cx4-1u hormal force from the incline, and a force applied by a person that all are equal in magnitude uc4 t-ychd+r3*xc7ju hxfw 13. 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.