96.30: An 800-kg elevator acce.)hyp ,grfyqc+8j( fg lerates 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 inq p/2m +umu+vzdecw1 , an elevator. At the instant the elevatoru +qpdm/ u+cmwze1v, 2 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 4nnatvz6 -o j2lw)(krwo /nx2 bathroom scale in the school’s elevator. When the scale reads 520 N, the e4kzn o/l6jrvw2 ow t (2a)-nnxlevator must be

  00.12: Astronauts in anvb7hwi,zd)l9jt s 6vj t9w: .l orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Spamp*d*zr/5 :yg(z brvuce Station experiences "weightlessnesdyug*bv5zr(p mr/z :* s" because

  11.10: A string of negligible mass:kla wv1p5n9sd1vl 3gi0 gu1 ld5e )bz 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 representwevli) lkg15a :31vlddzg0p bsn1u59 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 negligiblejr )g1u1 zoy0 soy4xfq0s(5le mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward accelerati0 5x01 elgs yy(ofrq)ju1os z4on 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 y2c-ykq7j ) um netngzuz,jq6 ue87;2 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled n2emn8kc,tjuuj uy zg7)2qy ;-zq7e6 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 horizontal frictionlis.,mi; e7vtq ess surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constae7 im t.;isvq,nt 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 fri* y slcph 44eq409niycctionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a coln he4c4sqc* yy9i40p nstant 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 horoo :lvg28 3pnf.4x2s+boamur izontal frictionless surface. A 36 N constant force is applied to X as shb28oo+s3n:rv4gm ulx opa2.f own to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are coh3xlmw r sgr)6,): r oh7.hh8eect5 bjnnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. jehh,gmch)6l)r h :eb58 wr73r.xsot Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless i jtfhvh463s(fu- 5x whorizontal 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 smaller box6 wuhv fitxs53-jh4( f?

  17.15 : Two blocks X andY are in contact on a frictionless horizontal suvhajnrmxxr0zi ;/x,0bk,qk8n9gc2* hpc91w rface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of th1k k pc* nrwvz8xgn ma0b/q9cj ,0hx9 ,ixhr2;e force that block X exerts onto blockY?

  94.25: One end of a masslexsexdyu bm 7 8+86x(opss rope is 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 accompanying figure. p xoyx8m7db8+u(e6x s Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3c i3q 2dx01kyt.0 kg on its ends is hung over a frictionless, massless pulledyk x2i1 0tcq3y as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connecc;b (6,wjr0vhamd, h/pq s+i fted by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light fricti /hbrqscdw60h ,(f m+a;ijpv,onless 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 lirbe.htvau k2zp y65b.2o0 5marger box of mass 2m as shown in the diagram at right. When a force F is applied to the large box, boa v r5m2b65o.hup2ykib t.ez0th 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 aqn d.8ah eer)90mr2cu :bvb 7tcceleration up an incline. The box has an initial speed of 9.0 m/s andd9b2eu: )h qt.b7c0rnv 8eram 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 initially at rest xzg:7yv+cop+e/ *e4 .xm pm)blkn5k /eyjoa 6 on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of fricvgk .: expe/e5)paz 7xc+ l y4jomy6*o nmb+k/tion 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 frictionle /vi 957::xx /n gaws-af6ktnxupof 8xss incline has 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 incline makes an angle θ counterclockwise from the horizontal. Which one of the folok7u:/vaftxs 68gx-xwpa : n f9i5x/nlowing 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.