96.30: An 800-kg elevator accelerates dbyhr+hn. h 3z5ownward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands on 7e*ozzzo 6b38 o9bzqba scale in an elevator. At the instant the elevator has a downward a8zob 6o z*ebq7bzo9z3cceleration 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 bathroom scale in the sc kr gj9tkv6p78hool’s elevator. When thekjt rg976k8v p scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space naz),riql1z( shuttle are “weightless” because

  06.16: A scientist in the International Spk-wj boau 7j(0)-ejfcy) h5srace Station experiences "weightlessness" bec fy)0cw7ejr5 -jhakbjus-)(oause

  11.10: A string of negligible mass connects an object of mass M=10 kg to the c8.pwa6r7::+ fphnn wamp+1zbl oz,w0 r y8 znjeil 7:bro.zfn aw: yh6+88p0rw1 ,pazzwln+jmpn ing 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 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 mam2egf+8 pyyb6 ss connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experience8mbp26 yyg+f es 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 frictionles jgv,cct2*k *q e :urq+zs*p 8v1y4ctrs surface are connected by a massless string A. They are pulled horigp1jz rs4etc *vy2,8rv +tq:k *q u*cczontally 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 fridn) 9kmdff3u( ctionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant accfn) u9d3d m(kfeleration 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 ;z7q jp+friv vw c/3g2surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant p q;zi2cvrjwf g/3+7 vacceleration 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-.yssm/y dj(p on a horizontal frictionless surface. A 36 N constant force is applied to X as shpsy- /djms( y.own to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg andmox+bu87fzrg vyu( xz x/p2:f4z*yp) 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming frict7g 2mpz+yr:8z(*fxbu pv4z/o u fyx) xion is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal surfa4:ak+6 fe)b 1j. fg,uvqz))vx logytkce 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 b1g:. q))l+kj6afe )xv z,ukgvbtfyo 4ox pull on the smaller box?

  17.15 : Two blocks X andY are in contact out;-hro) eqi+n 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 exerts onto blockY? i;+)o etqrhu -

  94.25: One end of a massl2*w79l +u oovekf u1xzess 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. Mass m accelerxz92leo+* ok u1u7w fvates 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 iiihxf8i5e i -5ts ends is hung over a frictionless, massless pulley as siiiif 5- x58hehown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 : p nkc7z-.7)fnbldgnand m2, are connected by a cord and arranged as shown in the diagram with m1 sliding alonfl7bpknn:c.d-gz n7)g 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 isplaced on top of a larger box of mass 2m as shook ol)86njqt zp qwopk9(2q;,wn in the diagram at right. When a force F is applied to t ,l)p2j9p;ook nq(6kz qoq t8whe 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 smaller mass?

  17.25: A box slides with uniform acceleration up an incline. Theox6vk3+x ,yhzbh6v(g sjs gb, 81bos6 box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the incline g,6 s+o ,6s6kov1 3hxx8bbyhz b vj(gsis$30^{\circ}$, 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 horizonta4clnz5vevoe8 5 h2t w2n 3*gypl surface. A constant horizontal 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 as3lc2ve5 en v y2zh4wn58t*pgo $μ = μ_0x$ 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 qe-9nl wwu r5mtk (+k(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 incli(k(-ww n9ukrm5 elq t+ne 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.