96.30: An 800-kg elevatvpl1fn - 32v 3:hgwsgxor 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 ther1 qecdbs0p 3ge.8r:c elevator has a downward a d1r esg. p8q:rc3cb0ecceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 ubf5 trech0lc:mr.n z- ( ucb1 ok;7s)N stands on a bathroom scale in the school’s elevator. When the scale reads 520 N, the1k(.- bz05ccl ht m7;)csb oruf:uner elevator must be

  00.12: Astronauts in an orbiting spaaudqq17ky66z *4smbehg 07 un ce shuttle are “weightless” because

  06.16: A scientist in . (t z6zysana7.0 rinzthe International Space Station experiences "weightlessness". a6yr z0a.ns(iznt7 z because

  11.10: A string of negligible mass co-y6q 3x8u/vof7vi q cdnnects an object of mass M=10 kg to the ceiling of an elevator. The elevator exper udfc3v6q-ov7y8qx /i iences 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 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 negehjd 1jj ;pluuw;/ i0+ligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnitudeejdjup;/ 1;ihu0j w+ l $6.0\; m/s^{2}$ . 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 frictionles9f ::p i rxv:wzhwqs- +jrd1+rh z+-wzs surface are connected by a massless striq-i:jph9x wz ++rvw: z+-rs:1r zdwhf ng 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 frictionless srqr4 ;kqrfsvp9- ur 0*urface are connected s;*frruk4vpr0 q- q9rby 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 horizontalpqqkw:e3 v ,wt(( 9u q w737elsm-zely frictionless surface are connected by a massless swwle,k7 tzlpq e-:9q37yq((3mevus wtring 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 hpn.0 mcv lgcx q.58u6yorizontal frictionless surface. A 36 N constant force is applied tolguvyp . 8.0m6xncc 5q 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 string wtxj(7t jt6-ly xq6 ve3m;s7rxhich has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negl6 my 37rxtv-q 6 ;jtstx(jex7ligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the rc87 f agcmz-p80e xyi9ight 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 horizontal force pulls on the larger box, with what force does the lc9epx8c 7gia y m8zf0-arger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a fr2r 4kwqb ybwqkr32 cr:6(rti1ictionless 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 e r1y bcrb:6qiw(3kwk2 4 rrtq2xerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the othee cw76(ne .ghqr end is attached to a mass of 1.00 kg. The rope is hung over a massless fri7 hwe cq6eng(.ctionless 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 m*d7:crh ,manr; 8s fwqjhoi6:asses of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to trs j*:dwoh;:qf c7nha6im, r8 he right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are 9b bm29o;bk1.z ftjiuj4zi o*connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2z4m.1i kif*oo b j9u9t 2bzbj; 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 b )y fbx/krut7rivaa 9**9*iyof 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 y fr**ka* a9tx7 bu9) /iiybrv friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uni i jthq6o*6 otf,czl3;form acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertica ct;tl3,fo*oq 6z hji6lly 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 inc ,wfw1u0d xqf 7e5+btitially at rest on a horizontal surface. A constant horizontal force of mg/2 is fw10fb,5 dxwqtc7 e +uapplied 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 grz 2ll40nh-y quavitational 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 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? Tlz nh 2-4lqyu0he +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.