96.30: An 800-kg elevator accelerates downward a, .bde al )18wyjhbv6qvdnf:5t$ 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 tbs( t7p5(k2 oim4q csehe instant the elevator has a downward acceleration of 4bc 7oiqm(2s5(sketp $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weigh;z*7ws*se 3 a.hhvk1v8 nibhging 500 N stands on a bathroom scale in the school’s elevator. When the scale reads 520 N, thesshav;hgb* hw1*z37.e ik8n v elevator must be

  00.12: Astronauts in an orbiir(qkc pl/j a6e.t )8yting space shuttle are “weightless” because

  06.16: A scientist in d+fkawq1)ito6609dsq 9f konav .h-gthe International Space Station experiences "weightlessnes9-66qko9+fq a0vw sd1df hita go.nk)s" because

  11.10: A string of negligible mass connects an object of mass M=10 kg g::w u5a1knm, d nlxngm5 ys,0to 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 maa,gndgkyn:mu ,n w:105 5mslxss 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 nvtd0ryw, vm) 5f1k6xo egligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a 1kxvmdr,o6)t 5f ywv0constant 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 surfc n87yww0yr, 8/gxnyc *j. nvvace are connected by a massless string A. They are pulled horizontawv wc 8jgy*0yn c,7.nvyn/x8 rlly 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 v 1;q-cwaa0ls: yxbk )w) 0j9eadolr 6on a horizontal frictionless surface are connected by a masslexo ;)1ayrabc w9k a6:d vj)w-qsl0e0lss 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 horizontalyp03 g 3sr jgy8t+zh;p frictionless surface are connected by a massless string A. They are pulled horizontally across typg ;htz+yj8 rs0 3p3ghe 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 hori7aa-cml6c 9orzontal frictionless surface. A 36 N constant force is applied tma97c rcoa l6-o X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a stb 0sx.f)i fez7t0q(jaxja;s+ x4crc:-k sb /ering which has a tension of 2.0 N. A forbi qbx 7ce0c-(r;xf : sas.+j4s/xet)ka0 fzjce F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are acceleratetn -u2(,.c.ynf- nya.xt cou id 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 horizotxyfu.n. .o 2uca ,ci -tynn(-ntal 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 surface. A:k p-u1g *a ,dl0h0oyhed6unrml6)s z constant 35 N force is applied to the right onto block Y. What is the magnitude of the force thata oy:0)e h unr6pmdz-l61d*sk ,gh0ul block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the other end is ekwba(4ln6 5/ psfgxv7 n5)br attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pvg /bn5xp56l n bsar wk(4fe)7ulley 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 itswwwi/ip43-l.iw y ./ n+pzbk pj/pz aue2w/ h2 ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the mas2/3p pwih-wpuibw a jzl. yw2z w+pen/i/./k4ses?

  02.36: Two masses, m1 and m2, are connecvh2 .l/04oj.yma r0f lfk1atoted by a cord and arranged as shown in t 0.aollo 4h/vj.trm20fy1fk ahe diagram 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 isplaced on top of a larger box of mass 2m as sq s00e+7 qpz0mrdas 6qhown 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 accelerating the small 7 0mssqq aepq0+0d6rzer mass?

  17.25: A box slides with uniform acceleratig:eh5+h n3h txsp00wn1plvny./ 9 rybon up an incline. The box has an initial speed of 9.0 m/s and rises verti+0ppen 3 nbg9lwxy/1.n:h0h5 hrsyt vcally 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 a 7zkm/n8wrsa*t rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surfac8nm7/r saw k*ze 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 y cy.bz3 .(vhynormal 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 upward, parallel to tbhy(.vy .3zcyhe incline’s surface as shown in the figure.