96.30: An 800-kg elevator acce+ (r *mdy0zqcmlerates 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 scd;4o0k t qum(7 fb(segehz/wo)1 +cmbale in an elevator. At the instant the elevator has a downwardk m)zt(bd f ebowseh0ogu/4(7q m;+1c acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighix8-ezjdsn tmc ie4)mbq9b 2(2ng 500 N stands on a bathroom scale in the school’s elevator. Wheebn4b i-jd m2mq9sx8e )zct2 (n the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weig /z.ix4r37fo zkf1mri*yuq ;i htless” because

  06.16: A scientist in the International Space Station experoc 8p2mdhehx-p71pe,mrpy buqt7,un9 o ,7d/ iences "weightlessness" because, br7dumpoux-n7y/e2 p h8e9 c, dhm1,ptpo7q

  11.10: A string of negligible mass connects an ob5a;nc0gki5f rxml 31q6;uc hpject of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward speed of 3.0 m/s. Let Trep fnca5p;cxuh 5 0rmk1 l;ig3q6resent 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 the mass M. Which one of the following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an objecyy 1 brefy:s:le4tf) ij w7mfyvigj 6x:9e 0*/t of mass M=10 kg to the ceiling of an elevator. The elevator expery:ee 1w irb *6ml7gije9xy: )vyj0yf :/f st4fiences 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 fft,sft*i 3bmhu4b,/orictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleratuhmo f f*tb/3s,4 i,btion 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 frictionles 6m-9 /nrp1r(/bp ;rxtfy2x6rkucszp s surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant6cbp(6p/x/t rzrm ;xrrfu 19pk- 2 yns 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 horizon/w tkwa9 1r)k is8d-nutal frictionless surface are connected by a massless string A. They are pulled h dni8 akrts-9 1/)wuwkorizontally 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 hi1sq c2 8dhf,gorizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted b2fq1g8dis,h cy X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a* ,ud1 tyukfy- string which has a tension of 2.0 N. A force F acts in the direction showfy1*, du- ktuyn to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horvn ydr07v 6nu8c)/fef..rzt fizontal 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 horizontal force pulls o)e08/.fz rtfn76vrc df u .vnyn 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 frip cd)li*sd9/ zctionless horizontal surface. A constant 35 N force is applied to the right onto i zp *d)sd/cl9block 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 st xt07i(bufxk*ow )vc 8 /e..sktwa)ass m; the other end is attached to a mass of 1.00 kg. The rope is8s)eko0.)bukwt/ tf.sx* axi(7 twc v 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 hung over a fr,t; .fkn5tt;oab1bkp ictionless, massless pulley as shown to the right. What is the approximate magnitude of 1tkb5ko;p,n b ;fat t.the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arrangxw4:*hm3wk d-v 1y ivsed as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be the mass of the xiys1vk3 ww-h*:vd 4m falling mass, m2, if both the sliding mass, m1, and the tension, T, in the cord were known?

  02.42: A small box of masw-pska6rt v5i+wy7 :bz.gn g3s m isplaced on top 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 woupabz.g7n6+s w- 5wgtkyr3iv :ld be the force accelerating the smaller mass?

  17.25: A box slides with -djm:u gn (c1zuniform acceleration up an incline. The box has an initial speed-cdgj mun1:z ( 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 horizontal sukthva8m )23gdp u, j1lrface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes witv2 j31gha) 8updlm,kth 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 ifez y8c)+ /uaincline 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 t)z8yc f+ae/ iuhe 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.