96.30: An 800-kg elevator k69nx8+wi dvi)6(k 1bgifh d eaccelerates 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 scal m650g9czkv 1+os lwnye in an elevator. At the instant the elevat9glcv0y 5s+knzw1o 6mor 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 bathroom scale in the schtel59e6-l ktd hz mw/+ool’s elevator. When the scale reads 520 N, the elevazld9l6t/themw +-ek 5tor must be

  00.12: Astronauts in an orbiting space shuttle are “r :o/f 7d7)cloiedxg6w16rr mweightless” because

  06.16: A scientist in the International76h v4rdu2var Space Station experiences "weightlessness"rrvuv4 726 dha because

  11.10: A string of negligible mass connects an object of mass M=10 kg to t5:1gxf/h b6c hrvxzn- he 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 represent the magnitude of the net force acting on thvx5g rx1hcb h/-zn :f6e mass M. Which one of the following choices describes the relationships between these forces?

  12.10: A string of negl5 l9 mb8ibzo w.(f;lbgigible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experibf58(gl9l i;wobmzb.ences 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 r.qese qkd .k(uca6rj4)b ,)mon a horizontal frictionless surface are connected by a massless string A. They are pulled horizontac.b4e)a)d r6r emskj ,u.kqq (lly 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 horioc5+iuera qpms+*r,7jgc: (s zontal frictionless surface are connected by a massless string A. They are pulled hoj 7a:oi+rsc g p+ms(ce5*uq,rrizontally 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 a,* zy ;xriv+nwvm):,idjb+f76ivb j cnd a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B witw7v vbdr:,i+zmi6xji ; f)y+ v*cj,n bh 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 id-q 4:om*faehorizontal frictionless surface. A 36 N constant force isd-*ae 4i fmoq: applied 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 strif (+.g3pkpf tv l/ 6kbg-7u0-fpmt jrgng which has ap/6rj lvm(g-u tg 0.tkfp-7ffkpg +3b tension 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 toy:5 p*btjkgs+ 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. If a 24 newton horizontal force pulls on the larger box, with whygtpkbs +:5 j*at force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless horizon.(s+yx q/tw3br6lbmbe be9 + tu1mlg9 tal surface. A constant 35 N force is applied to the right onto block Y.9mr/3my+e lt b69u(b le1bt+bqsgx .w What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rjp,xxz olb9.e r8,, ukxz-2o wf5pb+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 k,95xroo8+2zrz jlewf ,-,xp pubb x.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 over a fr n+od2- kw9wj,dn+f28 quh t8mvuji5victionless, massless pulley as shown to the right. What is the approximate magnituow - +5nkt8u2 f2uhm, dj+viv8 9jqwndde of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connt8wtq t:tkebddj u3 j:m3r5., ected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would b8 . djt: we3kj m,rutqt3d:tb5e 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 aby3()c4r-m7orcw -rrpx8 z gt 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. Th 4rw -r8bpot rzr (c3mg)cy7x-e coefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform accelep8i9x eqd0/imk ;+oqqq r*uz2 ration up an incline. The box has an initial speed ofrmxz;eqqki90i /+q8dqo* 2pu 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 horizonta*w6eg55dyfjyz p o 8xca79f- ml surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient o mzcywd8 p f5e-7jfyx56o 9a*gf 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 f0 iyn6rdcr-r*orce from the incline, and a force crr0iny *-dr 6applied 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 the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.