96.30: An 800-kg elevator accelk.p *2,9bel ur e/fvfferates 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 elevatvopdb5bef k,8 /s n3o8or. At the instant the eleva/b83vo8sdke5o n b pf,tor has a 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 m 3:aoz a6w 8x38eawnjc- tr4aa bathroom scale in the school’s elevator. When the scale readjt3:mwana83-a4x 6e rc azwo 8s 520 N, the elevator must be

  00.12: Astronauts in an orbia:lq)czih90i ting space shuttle are “weightless” because

  06.16: A scientist in a d qhq)bj3g()the International Space Station experiences "weightlessness" beadg ) qq)(h3jbcause

  11.10: A string of negligible mas 74+ap )x +t5xpz)ea-kdi qqmfs 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 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 represen k+- qxp4edpz aqx7))5fima+tt 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 object of m2 fj;x,29eopr a kujp/ass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downwa okajfjpx,ur9p/2;2 e rd 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 an2 bq2 uiq/qb en;b8t/ih9vj 1rd a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surfni/qe;bqui 8t2 hb2q9r1/ bj vace 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-gpcg 0-gav9q0ml2cuu9k yral frictionless surface are connected by a massless string A. They are pulled horizontally across the0 3y-kvrg9 2 g-m ucaclqu0pg9 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 horizontal frictio d :yhg88te1qonless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acct8dq1o g:8 eyheleration 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 horie0+* :jucf js)z/qbxtzontal frictionless surface. A 36 N consta)zxje:s *tj/0+ qb cfunt 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 co1yhm0a8zf ui f 26.lbrnnected 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, whb0. f y2u1 8rfimhzla6at is the value
ofF?

  99.12: Two boxes are acceleratd 3sg 7,tbdyu;ed 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 mabsudgt37y , ;dss 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 ark0 ;nd ot.na0 ebtw0jf7q2nc4e in contact on 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 blockt4c;ob n0td0f2q wn7e0na j.k X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the / n lc)rauw:g-other end is attached to a mass of 1.00 kg. Th wru:c- /gla)ne rope is 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 mmzivw7 +p emmm8,mu84asses of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown z,7uwm+mv mm4m8 ei8p to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shown i,z dd71oswb-ry ck34 0ezf3uin the diagram with m1 sliding along on a fre3,4uzw 17f-ryzb dds kic o03ictionless 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 jl2 al11( qyreisplaced on top of a larger box of mass 2m as shown in the diagram at right. Wher 1 l(1jelqy2an 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 smaller mass?

  17.25: A box slides with uniform accelerati:bw-s l67 uqazon up an incline. The box has an initial speed of 9.0 m/s and rises vu-w:6la 7z bsqertically 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 mikbiw6 dpk zq19m58(cr s initially at 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 surface changes with the distance pushed a65wrip 8q 9m b1zdkck(s $μ = μ_0x$ 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 forceob6f1mu k78h2 v2xnepe9 yj u9,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 thee1u2 6n 2 ymxf7 9uhjkbv9peo8 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.