96.30: An 800-kg elevator :iyi 9b pc1cre*j*v w1accelerates 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. koziw-pra8 yavn na 48/gh/++At the instant the elevator has a downward acc 8 /ipvwagank/ y8 ha+z+or4n-eleration 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 o e3st*qd)nf( vn a bathroom scale in the school’s elevator. When the scale reads 520 N, th*3fnvte( s )dqe elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weign , hij oc-pvyprq+to: s5(;o0htless” because

  06.16: A scientist in the International Space Station experiences 3rbv2c,,dy gl7 pikd., j g..cbo- sej*gzk+e"weightlessness" becausg2gdrekcdsgbp lo e.+.*73j,z-kb .ciyv ,j ,e

  11.10: A string of negligible masssvonhdzg- q):d( xm*5 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 -shdgm*o:5v d xzn )q(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 obje bdd:hde0 c,/ils3 ;qqct of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnd:0 /c;,e q lsiqbhdd3itude $6.0\; m/s^{2}$ . 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 surfacehcu*8 xk3ozk) are connected bh* z8k3kxuc )oy 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 B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizont/ 3*ljcz*hde mal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accelem zl3h/ j*cde*ration 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:-uqzx zo7086(mayub q mpw kg;w8i-d a horizontal frictionless surface are connected ab: um-zzm8wu(kqi 67 p 8;dywoqxg0-by 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY 8f+g7zq- f1jpnr:zhep ;kvi* (d os0nk*qy .zare in contact on a horizontal frictionless surface. A 36 N con*i:qzr. 81-v0fkh ;zgn +sp (d7kyq j npf*ezostant 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 kg and 3.0 kg are connected byp4p wfg,5fyo(: vkt *)go 8j/omlp(by a string which has a tension of 2.0 N. A force F acts in the direction shown yvo:tgybj(,f5/o (pfol4 pk )*pg 8wmto the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on ayq2nmj 6x ),+lkgp yrxos)8/p frictionless horizontal surface as shown. The larger box has a mass of 9 kilograms and the sm2 8,nk/ p yl)6)rqg+spymjox xaller 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 hopwijgx5:2mr z+*z4vx rizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the forcvm 2g*4pz jxxw+i:rz5 e that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; then0ze4sa m7:/ l: yqehi other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as showne4 7a /ziq0nysl::hme in the accompanying figure. Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1b/70kmsubjft9q+d ) f.5 kg and 3.0 kg on its ends is hung over a frictionless, fm fbkbutj+sdq /90)7 massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are cl4;; cukfxy1-rt c7ov onnected by a cord and arranged 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 falling mass, m2, if both the sliding mass, m1, and the tension, T, in the cord wuf 1;rcotly7k4v ;c-xere known?

  02.42: A small box of mass m isplaced on top of a larger box of mn2zl;l drtal.nk (-2mass 2m as shown in the diagram at right. When a force F is applieztl .m(l rnn-;22kadld 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 smaller mass?

  17.25: A box slides w* ;fny.0xtd kltq+wq) ith uniform 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 ot.* x +tnfl0;ydwkqq)f 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 surface. A con ppxtrrlrq7ou zq7q+5q-0*w3stant horizontal force of mg/2 is applied to the box, directed to tx 7pp0zqtq5-r3 u*7 rqqorw l+he 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 incli/,utqv /x-nb1 mia3w.bww wc3ne 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 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. waw iq3/n-b./v,wxu1 b 3twcm