96.30: An 800-kg elevatot0z bhie(k .0:rn*fwm2i wst88xglv:r accelerates downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands ond e19jo-k,tof,o z lp c)u11 l;gl3ybd a scale in an elevator. At the instant the elevator has a d1 glu; 9po1y, o-blcd,3l jkzefo1)tdownward 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 bathroojyi1(7 +b;m( h.b po2yeulykg m scale in the school’s elevator. Whekl1b7uy; m.yyoi+(pj(2 bghen the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttl+02crz0qnsd q9 fe+1zo 6enbh e are “weightless” because

  06.16: A scientist in the International Space Station bxnchi666:fy)e h0rm 82 zso qexperiences "weightlessnesoy66e )qsnhrm6xb c0:zf2h8is" because

  11.10: A string of negligible mass connects an obj37zhu y5+dfetect 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 b5ey3 df7 ut+hzy 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 ne4ks( n2qh ,krzgligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator 2rsh(4zknkq, 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 horizontalrpehqsi6 lqku/u14:b4j4ae8: + cj xw frictionless surface are connected by a massless string A. They are pulled horizontaluwru4ee4ajk qqb4jph 1 x/6:l8 cs:+ily 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 au9 -qv;ja9 dx lrglvsqb 02:m.i/ 2tesnd a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled hlv:;btervs u.j- i/ qxq 9g229a mdls0orizontally 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 maszcyjx 4i p61j 0lm4gus.hr9. xs on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface byu.y940 hljmx. rg xis4c61pzj 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 an 2qtxc gw(,ph7dY are in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. wxhq t,7(gcp2The force exerted by X onY is:

  97.31: Two blocks of mawejvenkfqw :*vq81), ss 1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F wq *8 vq:ekfw1vn)j,e acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated ti 4mn4; ax nt97mkxc-5w 9sqrco the right on a frictionless horizontal surface as shown. The larger box hasa4imxq4k 9nm 95x;tn7ccswr - 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 contacvtxx7uyc ( sxng -r0s szs4l0u4q(;,it on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exertg ,- s0uzsscsxvi4uqr x 4y;(70lnx(ts onto blockY?

  94.25: One end of a massless rope is akm,7bo , ye:jmiegle,*yi9 p/ttached to a mass m; the other end is attached to a mass of 1.00 kg. The rope ism7ykmi,ygj ,o, /* i9eelpb:e hung over a massless frictionless 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 of 1.5 kg and 3.0 kg on its ends is hung ovit,0xvi/0.+wg kpe wln ea8-cer a frictionless, massless pulley as shown to the right. What is thi elaiv-ep ww0x,0g k8t nc+./e approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by av*5 vf iakt1 sy(g6mc2 cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging fsc k2gt( fa*6y1vv5mirom 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 o*ixh qu jk(5pdb+3f o.f mass m 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 , of*pb xiu3j5 (hk.q+ d what would be the force accelerating the smaller mass?

  17.25: A box slides wic,txtfb: b2 .ith uniform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the inf bxt:2,itbc .cline 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 horizontal surface. A constan0i jk3lx2+hp zt horizonxpzi lhj30+2k tal 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 a gravitatio4( *do+2z1fi )*jlblbad jp0ec/z gzonal 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 following choices best describes the orientation of the applied force by * z f izbjg+bp(oa2j odl*dc041/)lezthe person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.