96.30: An 800-kg elevator accelerates r5*vz7oq(. dge8ow qpdownward 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 thw1/tu zlz( 4 :ja/dhkle elevator has alhu/ (a :jd zk4/lzwt1 downward 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 schoo+-0/ yums;zj6(hyj mcs 2o(pjlk f+yol’s elevators /u+y6p m2yhy+(czml-osoj ;0fkj(j. When the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “wej/ym g8c;z5c 0j nqo(bightless” because

  06.16: A scientist in the International Space Statio*kqrcyrw l ,i(c(s,l0n experiences "weightlessness" becauseyk 0c sq*( lr,(,lwric

  11.10: A string of negligible mass connects an object of mass M=10 kg tozg,dlcy 4u:r- sc8*ws 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 mass M hanging in the elevator, and F represent -dcr,l* wc84 yssu :zgthe 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 object of mass M=1n3fc2wop-i ,p 0 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration o,23npcw iopf- f 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 ho5tpm; my yrmv+8knez25:-i,i8aqm u o t)v,i yrizontal frictionless surface are connected by a massless stringyzt,u-tmy5;r8e k+iiq:m5mpo, y28v mvi n)a 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 a rizis6hfh:)e 2 9r ;*gtmb9qend a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accelerationrz2t 6f)e ;m:bg *eiqh 99rsih 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 e3vu -bci3b+j 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally ac+j -ibu33cevbross 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 c -/wmzw9;ft.cbo0 jzr ontact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X onY is:om9bwtc-/z.f zr0;wj

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connc) f +zs,z7yga7wucs3ected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, fwyz3uc,sg z)7a7s+cwhat is the value
ofF?

  99.12: Two boxes are accelerated 9obr,x + t2kbm0ljyum( +d)coto the right on a frictionless horizontal surface as shown. The larger box hy ( o m9cdtob0j,)ulr++mkb x2as 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 larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact o8v*sndlb3jq7,n v m +a58y oxhn a frictionless 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 exerts onto y*vhx7ol8 j53d8qs+nb , manvblockY?

  94.25: One end of a massless rope is attached to a mass m; the other en9;s,xc -mka d iu0e/kw v4,tuxd is attached to a mass of 1.00 kg. The rope is hung ot xxs4;du/ve9m -wi, ka,0ckuver 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 0ojno*:eg,y,jn1yc*g ljw .h1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude og*0, jjw, hg1jco oy* e:lynn.f the acceleration of the masses?

  02.36: Two masses, m1 and m2, a*-w b9u2.dub 3oaak:fi vbcc5 re connected 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 tensionba f5bw -2kv:c u.ci9bda uo*3, T, in the cord were known?

  02.42: A small box of mass m isplaced on tkwpa) ouo.0v2 op 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 t)u p ov0w.ko2ahe 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 with uniform twng+s;*v ib7 mfg9 rfeif zh21+6 a8uacceleration 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 inclg6i+fau2f; 7 *n wrgim sfzb t9ve+81hine 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 onasf(v,t3u4j56 kx m vtt i0e;e a horizontal surface. A constant horizontal force of , t3;ea jkt4ifveu(mtv560sx mg/2 is applied 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 fr m mmb7 3sryl1:;3jtsrictionless incline has a gravitational force,a normal force from the incline, and a force applied by a person that all are equal in malbmr:tjs3rms y71;3 mgnitude. 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.