96.30: An 800-kg elevator accelerates downward a*s b:*uf4qr k mbi wo kd/-g7*0jo4jaut$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student standd+ s0la3:d-k) vp7 )fvohvvnrs on a scale in an elevator. At the instant the elevator hadn0:olv)kvsp)v d+3 7vhr- fas 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 bath0(vr/)- lc izduyem1u room scale in the school’s elevator. Whe-1/z)udi ve0yul mrc( n the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttlp n8pj+wmo,*;kfr,rce are “weightless” because

  06.16: A scientist in the International Space Station experiences "weigha.p av t4wc-,xtlessness" bectpc4,w- .vax aause

  11.10: A string of negligible masm e;iyc 0ru.u.( wpfl8s 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 0y ;lc. m.weuu(ir8pfmagnitude 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 negligible mass cuj08 ihgl:8zlln6a f1onnects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a conal g1f0 l8nizju68h:lstant 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 horizontal frictionless surfac957nx x6vblftc7zm2,hfk se4e are connected by a massless string A. They are pulled horizontally across the surface by a nm c5 lhebxf2 f, sx76z7k4v9tsecond 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 ;;smcevn 9m ol-rfk gz:1d/v3 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizodvo:sc -k zvner 13/flm; ;9mgntally 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 surface are ; (g.ys wmv52r tjtyo qi26hl. c rwh3nrw;v52connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration of ws6 hgw;n2;2yvwr 3 5jc2h.vqot i5(tmry lr .$12\; m/s^{2}$ .
What is the magnitude of the net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact onahmpg efi vew* 2r7z4im* 7:3m a horizontal frictionless surface. A 36 N constant force is appli3* m7i4iemp7a gf2 : v*hemwrzed 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).c drr6 .vfvr which has a ten).rc.r r6 fvdvsion 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 frjld; y*+j7l qj vodo2,*vfp:eictionless 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 bol dj+2vo ;j y*7ep vlfd:,*ojqx, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in f gm09u-5 afqocontact on a frictionless horizontal surface. A constant 35 N force is applied to the right f 0-aumogf9q5 onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless roql /*id2fe *2a3h lr4rci3i ybav (oa,pe 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. Mas*cfqvria* (y3 edr42/loa b ,l32 iaihs 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 overa xi,k9fr)p8pg;jp: k a frictionless, massless pulley as shown to the right. What is appk8 fj);rx,:pk i9g the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and gxn u9/*c9zv wgd-p;y;- jquu;c9hss arranged as shown in the diagram with m1 sliding along on a su-wncuj ;d;gq*hy gx;p 9c 9z/vs9-u 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 man71l3yyc gd4.fp3-5kn ,ze gfky b)sjss 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 , what would be the force accelerating the zgky173 k3-g)5dnbjyf lp cy4.s,fn e smaller mass?

  17.25: A box slides w o-0-n(/oiz xaw,1 msy:fha)fwrmc r: 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 )-0 (1:w ,canrf wzm-yr a/:h oifxmosangle 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 horizontal surface. A constant o 38t twqb:m1fhorizontal force of mg/2 is applied to the box, directed to the right. The coef1w3 bf8qotmt:ficient 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 frict (coky9d,+mcj7.6vidx + w nfsionless 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 wyx+dc+6fm7j kcv d9n,s .(io 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.