96.30: An 800-kg elevator acceleratet(-oqyfhbr6 vxjgi14t 9n9z 1s 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 elevalmhcfs t k4k5i79og.u,8k26fc q ug(jtor. At the instant the elevatoq68jc7 gif24l 5f c,u9m( hkos kukgt.r 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 a bathroom scale in the school’s elevabx0 k/on)fcs ,tor. When the scale reads 520 Nb0kcxo/)nf , s, the elevator must be

  00.12: Astronauts in an 57cur, :,n a-d 1i :sebz4ou5oalvsmnorbiting space shuttle are “weightless” because

  06.16: A scientist in the International Sp m xvg8t60zc4fb yn*)sace Station experiences "weightlessness" becamg6)tz 48ny *b0fsvc xuse

  11.10: A string of negligible mass connects0ge 7gzxtki+d u.f-) ht)taj, 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 h d x)g-0j+augekz7 titt).f, 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 object of mass M=10 kg to th02 p) erlwzf1 k omfhm4d89tai p01f-ie ceiling of an ele- ih9f0 irfl)2tafwz mk de10pm4p18ovator. The elevator experiences 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 frictionlesio. u a8jk3(sh9mjq,cs surface are connected by a massless string A. They are pulled horizont, .jsu98qhmkaoci(j3ally 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 kgl7z1dsj4oqh bw p.wp0;n- )eje5fj p1 mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the supj.es- ;h5nppoew14lb qwd 170jz )jfrface 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 kgnk8 -lp9irfi0nb z tj* 94od8x mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a secon4 8 l0bnd*jk9rfzinx 8-ip to9d 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 horizontal frictionless maj7-v 4dupngjd ,m iix1(e /2surface. A 36 N constant force is applied to X as shown to the right. The fjix /4 ,dg7-(up amdeij1 n2mvorce exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by :x tyql.hp:e ok8 5hv*a string which has a tension of 2.0 N. A force F acts in the direction sholkvet5 p:xhq yo* 8h.:wn to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frpzjck 8. 5f y0backaey5(h* r2ictionless 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 80 a*2cyk z55 rcbkpj .afye(hlarger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a fricysx u9 +6ne6vb 5hdwqa*))wa s(kr.xytionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is)yvr xw(h6qad 5x wky+ )e9s .*ub6ans the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope im fq.c+) :mlv70us-c u 8a ydkrben6r6z+nm:ns attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accor)c lf+sc7 :anzq-mdynmn ur0mku686. + e:vbmpanying 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 k.o/po baivws - 5j*5/6u jhqzig on its ends is hung over a frictionless, massless pulley as shownovqbj /hj. uai/* 5-o6iwp5sz to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1io.p07-r6 gbb1 r qbvq and m2, are connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from . 1vpr0 r-gbqb6i7bqoa 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 of mass 2u qa9rvsbc8nkzd7 a97 d,:( cim 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 would be thenu 7:9ad7(dizk scv9b ,8qr ca force accelerating the smaller mass?

  17.25: A box slides with unrq a. nq)jr4dih tat3i5.t4nx -4wkb(iform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2j)x idqni-kt.raqa n h34 b.4(4tt5rw .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 horizontalai;j,c 7,doa c surface. A constant horizontal force of mgjaoa7d,;, ci c/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 frictionless incline has a gravitational force,a normal w1gjuowf748c force from the incline, and a force applied by a person that all are equal in magnitude. The mass remains at rest fc47uj1owwg 8and 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.