96.30: An 800-kg elevator acvaf-6s7 v u1uereum0 +bjol2.z- iy ;lcelerates 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 scalezq2s v*1ff/l s in an elevator. At the instant the elevator has a downward sf/zvls2f*q 1 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 Nq./ hiwgix, lzg3 -c0j e/p,uj stands on a bathroom scale in the school’s elevator. When the sc,g e/ p ,g0/zq.jlxi3c-jihw uale reads 520 N, the elevator must be

  00.12: Astronauts in an19-eqzlzo; au,v u la36nv b5y orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiej, ey2*n. ujfh:e.xis/ kkv 5gnces "weightlessness" becausx*k j.j, inv e2. g:eyufhk5s/e

  11.10: A string of negligible mass connects an object of mass M=10 kg toxoir0mlmss cg)a*;*h b9) oalg/z7 e) 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 gravitationegabxl)*h 9a m/g moco)z;0sl* ) sir7al 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 connects an objecthb6oks w0w6 f/ of mass M=10 kg to the ceiling of an eleva bk6hwfo/ws6 0tor. 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 mass on a horizontal frictionless surface a g7i;gv;anxz (re connected by a massless string A. They are pulled horizontag;n;(xi avgz 7lly 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 frictionless surface are conn5 5 h,qtvp:*sshvrzf: ecte :h:vq5pts5h,z sf* rvd by a 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)) /d rrg6vsnp kg mass on a horizontal frictionless surface are connected byv)pdg/ n)r6rs a 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact on a horizontal frictionless surfaz/s qvvu7pj:6yqg4q e3 92cj c1d/odbce. A 36 N constant force is y3/u1/:4 6jsddqez gj cqqvob2c7 pv9applied 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 wh*tzvg gihcxesei(( yka 54. *,ich has a tension of 2.0 N. A forc4igge.(z( vk*ehc5ayisxt*, e F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are ap+mn tlm n7(a: uv-2edccelerated to the right on a frictionless horizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilograms. Im7ue ld2v+na :mtpn(- f 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 contact on a frictionless horizontal fy7spl q+nqx *(kf) a.surface. A constant 35 N force is applied to the righqn( l*7)qk+fxp ays f.t onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless ef076tuvpe (2aqgq3kw, a l j++vd+.0ko y zwyrope is attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is he.+2p qzwge 0o,akl0t+kv(yj6u+37wqfdy av ung 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 ap lz)kg7 (b 4ojk;i5ubnd 3.0 kg on its ends is hung over a frictionless, massle5 b7pkbgj(u iz ko);4lss 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 and z m .hn).y*v:ygvf+pw*j0sklarranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionlessyzlmhv+*)spnyk: fgw0 . j .v* 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 ig+r kf e6b,h6sb02lblolp (c0 splaced 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 all6,lg(rlpf 20lbc e06 bko h+sb surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The bo,w .typ+fo tm,qm 5izc7h9uy; khfi5- x has an initial spehomcuf;ztp , k5 q7yi9f+my 5t,-wi. hed 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 initially at rest on a horizontal surface.1rd h-25qbkhi A constant horizontal force 5qk21brdh -hiof 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 gravitational force,a normal forc wqogj,vec56 3e 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 follow5 ,6cgjwoe q3ving 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.