96.30: An 800-kg elevator accelera/ d+hg,,t 0ln6jg iscmtes 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 scu (+dl.g xo7wtale in an elevator. At the instant the elevator has a downwardd wuox7+g.(l t 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 on a bathroom scale in the sc*cw pimd9)zw* hool’s elevator. When the scale reads 520 N, the elevatopcww9**i)mzd r must be

  00.12: Astronauts in an orbiting spa p14 yttqwlq; mmb1)z ,xf/ 6 3(/zclhwqxbiu6ce shuttle are “weightless” because

  06.16: A scientist in the International Space Statia4m 5by7c9yoh xj h78e(j txw0on experiences "weightlessness" jyw4 7 x h9y(7ho50 aejxtbm8cbecause

  11.10: A string of negligible mass connects an objecwu/0g coc+ 4arpukr*.t 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 uca g4 w/rc+o.0kru*p 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 nn c43 luz/h2x0s* x suzet.bi.egligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences az4.2is/tnx ecx 3sz0 bhuu.* l 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 horizz(03 kd,sc+ ko9wboumontal frictionless surface are connected by a massless string A. They are pullew kb s+oz0d9,u(cmk3 od 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 fr20kw vyr6mm4d jt 0xo4ictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B y20w 6kd0vmjx4t4mrowith 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 hor.tby84e2t- nuxdj c/lizontal frictionless surface are connected by a massless string/8 db- 4l.c2jtxu etny 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 on a horizontal frictionless surfa t(ua+rbzl9c3)pl q1twg vep1.aj8b .ce. A 36 N constantp8eb +rwt j(pz 9tla uvba.13gl)c1 .q 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 kgtqg, l/kxp3g *gnvy 5*l7e r5i 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 tlp *e7,gvqy 35trxn * ki5glg/o the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the rf220 +6wqjlpgphiw 6p ight on a frictionless horizontal surface as shown. The larger box has a mass of 9 kilograms and the spiq+g2jwh6 06 2 pwplfmaller 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 horizolfq w(2 2yej; rl l9qbehaj(2,ntal surface. A constant 35 N force is applied to the right onto bloc9l qhw yja2(erljq(f2l ,b2; ek Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attache4 3 yf/ccbkiy7d to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accompanying figure. Mass m ac c/iby4y7fck3 celerates 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 hung over9-dqs 5f 7v o8/nrxrnf a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the af9qxnn-/85sorr dv 7 fcceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shown in pzvth**s8kss6 /uc7fm rj/zps1i x+; the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light friction7z8jz/cu*im psr6pss ;t*+ xf 1 /hsvkless 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 tpwjwep :ku3)w-yi 7juj;) g3pop 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 forc;uk p-p 3gw)juwe jwy3 p7i)j:e accelerating the smaller mass?

  17.25: A box slides with uf8 (pw.gf /iuaniform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the incline uwf.gp if8a(/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 surface. A consuplol*45z d x1tant 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 pushld4xu* z1po5led 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 for 6vxffjv*z:s7 ce,a normal force from the incline, and a force applied by a person that all are equal in magnitude. The v z:v* sf6xjf7mass 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.