96.30: An 800-kg elevator k jdixh, l*0sufk9;-p/ff c*raccelerates 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. At the instant the elevr+w;rk1 s+muyator has a downwy u1ks+mr +;rward 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 ba f4ne 1xjf) * 2-erm,ov2fgsmti k.x3b+yp6os throom scale in the school’s elevator. When the scale reads 520 N, the elevator must 6o1,x fxo2m3vfb +sm2-rfgp.ekt4 sje*iy )nbe

  00.12: Astronauts in an orbiting space shuthkfh5q 53o9+n4.+fyvb srt mltle are “weightless” because

  06.16: A scientist in the International Space Station experiiwt 9e dqm+ 9rigpqzw14 924p8wekw.eences "weightlessness" bt+k4re8i 9w2eq.w e 9m9p p qdwz41igwecause

  11.10: A string of negligible mass connects an object of mass M=10 kg to the(rfw*2/g**b59nt lyk:qj6vgpgipyq ceiling of an elevator. The elevator qn:*vq*y fglgibt (65k9 jpgp r*yw2/ 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 relationships between these forces?

  12.10: A string of ne:cu.tkuv+ a1+c5j lbteb 41,ez7hjmngligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator exm .5j+7 +z1 bt:atec1uevhbn, ucj4l kperiences 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 m1,-,*,)qychl xpm sssro mf(f 0b8fflass on a horizontal frictionless surface are connected by a massless stri sqs1 -b)mff,cfp,s hy0rll*,8 mfo(x ng 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 on a horizopvp5q v m-g)yo mwn:vc v4(3u:ntal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface bov( vmqg-)w4vnv5 m:y3 pcup :y 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 s(9k kh* cw*ifa; hii8horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant akhchi9s(* a f ;kwii8*cceleration 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 horizontaly 8dem *bxtc:. frictionless surface. A 36 N constant fx e8d* .bym:tcorce 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 i ddz*,eo2(p18oxyy w by a string which has a tee 1( dx2*dozyy o8iw,pnsion of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictioo p:i:m wec2m;qk 2jj2nless 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 horizontapqi2w 2mc;:m:kjej2 o l 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 rqn+hzp4pv4 f y4q35z in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Ypq+q34v4hr n4 yzz 5fp. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is at p5*h+*dv)ns fi plv0ctached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulspv5h 0iv*n)cp lf*d+ ley 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 1.5 kg and y x;*5u6 wuh*jro0qqb 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is theo yq u*6wxjruhb;50*q approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arrangedj, r yqv d p-n)2k6:szaj4/wyl as shown in the diagram with m1 slk)s4 dnj2jp6y-r av: y,/lwz qiding 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 tension, T, in the cord were known?

  02.42: A small box of mass m qlclj,4 -mr8 bl96rdh isplaced on top 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 the right with the same acceleration. The coefficient of friction between all surfaces is μ , what would be the f6 j 4lbll-r,mhrc89 dqorce accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. T8tmdid8+* b k*rz apeq/x0cvt:9hs8 t he box has an initial s* +x:k cs08zh t9/rp8ad8qvtmdi*tb epeed of 9.0 m/s and rises vertically 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 mis initi8xz+nzc6i-nja o y:57.kjhc kally at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to 8 :joci zak.h-cnxknz57 +6yjthe 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 forccgqk (e0b/ h 6s(akpi8ca7hq(;q:c npe,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 the following choices besn ip 0qc/qc kaq7a bhp6e;cg(:8k(( hst 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.