96.30: An 800-kg elevator accelerates downw(+)fvmsk; :u x znsxf f-1fbf*ard 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 the el9o st+)axjc ,wevator has a downw),s9cwjoax t +ard acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 50q4 3jfxnocn+:96glov4jww2h ,xinv 5 0 N stands on a bathroom scale in the school’s elevator. When the scale reads 520 N, thvlnjghv xnf3 54wo24x:q+o9nji w,c 6 e elevator must be

  00.12: Astronauts in an orbiting-tio5feg s9841ml(5aq g +l,pvf jg su space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experienc,kmniriz5*: a ugi 7l.es "weightlessnessiak,r ni5um* z7ig.: l" because

  11.10: A string of negligible mass connec 9eowxu+yy sk. ; 5r;sgo8ory.gb(w9v-)lbhzts 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 thezrx 5vk-ysy ys9w b+(uo.w .bl; g89grheoo); 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 kgshm h c;q+q5m6 to the ceil;hhmc+q5mq s6ing of an elevator. 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 massd k*,ia:pd .9wnqzm8 f on a horizontal frictionless surface are connected by a massless string,dkm.f:z p9w d *a8qin 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 onb3 /hckvh+-dzn*e 7co a horizontal frictionless surface are connected by - bc/*dcvnho7 ekhz+3a 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionless sul6k d:z +fv,uhrface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration of 6vfzh,d u k:+l$12\; m/s^{2}$ .
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 fries1;md1i 0+ 6y8htp zov)xusy ctionless surface. A 31mxss0u v)81idy+zyto hpe6; 6 N constant 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 by a string wicz /g;jh l g::jqw4 .8c*xyqkhich has a tension of 2.0 N. A force F acts in the direction shown to izq:l:k4gwj/c qc .g ;8*x yjhthe right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionles30bpst(e7hy c /r9at 7b+npl; rj x5hcs 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 larger box pull on the smallerax97ebc/7tc b;s +5n(h0 rpj3p thylr box?

  17.15 : Two blocks X andY are in contact on a frictionless horizontal surface 3xez2zmed,n91,-u rc ;zh:psx 7eqxc. A constant 35 N force is applied to the right onto block Y. Whaqxd , 2 cz-uc z 7rzx,np3e;xem9sh:1et is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass g7zs:lono(6 s 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 n6l7:(g soo zsaccompanying 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 kg on its ends is hungw8j vdn y*vqr s2 6kp.x. xg.4rffl0*a over a fricti.rx. 8jkxg4qpfa0rw*sy2 nd .6*lvvf onless, 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 connected by a cord andc rn-v.o.;p)p* ug+p0sioyd u 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, anpoyop c)0r.*s-uu gpin; . vd+d the tension, T, in the cord were known?

  02.42: A small box of mass mutvv;is*1 a k+c8d-a ij81 hsa isplaced on top of a larger box of mass 2m as shown in the diagram at right. When a force F i saa8vuv h ;*1c 1s-itakji8+ds 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 accelefe v7 7blha,/3re5gblration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If thga7e erv7 l5bh3,bfl /e 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 hor,,fg f6szbgc , 0btb7pm4 vde3izontal surface. A constant horizont ,6 ps,7cf3,dtbgv4gf 0zmbebal 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 $μ = μ_0x$ 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 kc8moa24:ql*e :.auoh.izoeu1 7 ztv 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 inclinm81o qo: oea . e:4viath 7ucl*.2zzuke 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.