96.30: An 800-kg elevator acc(at *4 w)1fzv:qddu,ab+g -s *bhcwkmelerates 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. A3h byd4+zum xsfs +nsi2x/jy p-d )(2yt the instant the elevator has a downzymddh spj) sbin y3xu x +-2s+y(42/fward acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weigk-wgv0t (tye5 hing 500 N stands on a bathroom scale in the school’s elevator. Wheneytk(- tv5g w0 the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting spel;(k9 o95o7 mhx a9bci8vpohi(3i zkace shuttle are “weightless” because

  06.16: A scientist in the In0ebyc jl6 ./x8q7zkyp ternational Space Station experiences "weightlessnes jkp/y8q.ce6x0z 7byl s" because

  11.10: A string of negligible mass connects an object of mass Mm;nnqvq:torwkxej (, 68/reiv c :d *9=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 represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the x6kvqo, jwmecr/rnn t9 vie q8(d:;:* relationships between these forces?

  12.10: A string of negligible mass connects an objec*+n ntuxa ir kd;4duhp3(x0br: ad0 /tt of mass M=10 kg to the ceiling of an elevator. The elevator expetkr*:u3b; d0atx(nix h p4/0aruddn+riences 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 andac2f -7m ibl*qtd9b)5b zu l7p4 jcq3p 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 acceleration of u3bb2tqc7l4jdicb 7 q-zl )95m*pfa p$12\; m/s^{2}$ .
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 m:g5sf evx6d/l;wuewb-jv(4 horizontal frictionless surface are connected by a massless suls (mvdee54-j6w:fgxb;v/ 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 force of string A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionless sur.:; xu8j n: qv6km50y yxroowvface are connected by a massless string A. Thero:x yw:.6;8j vv0qnkuxm5 oyy 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 contfn3jhi(plb 2)act on a horizontal frictionless surface. A 36 N constant force is appliefph2b i (3)ljnd 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 connecfp/:yakc .s1lted 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 necky/1p. :l fsagligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizont.v ; syu+x*7vyxrc 0he:rvlt8al surface as shown. The larger box hasst x ;ulvv7:y c+*.rexh80rvy 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 on a frictionless horizontal surfachf9ac5/f wl u/e. A constant 35 N force is app/uwflh95 fa/ clied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attachednlv5 aezq-(bgil:wzg* g- g23 to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionlessgz nz(i gq25v:e*lgwbal-3 g- 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 ofwyd*p 1:qzm/x 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the apmw:1dxy / pqz*proximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shown)ap/j r*y-b9wpg 0wwy 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/p pbyw- 0r w*jyw)9ag, 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 bak32mlb+.dm oox of 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 cma.dkl o23 mb+oefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box tq+e(o -(7+ iiuw6zfwiv0/jntl3 n bz has an initial speed of 9.0 m/s and rises verticav eu(n7i/zj3 ni6-lt fb+z( wt0+wiq olly 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 zne 4n4rwq tmc9.wi+3 mis 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 as qr4twecw93+i.z nm 4 n $μ = μ_0x$ 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 gravit1fd/dsmyw z pid*r8g 7lag-64ational force,a normal force from the incline, and a force applied by a person that all are equal in madpm1g/srd48ld*ig fy6a-7 zw gnitude. 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.