96.30: An 800-kg elevator accelerates downj::ugkt0ba; kward 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 scale in an elevator.+7vqu k4*y m7nvxfn5j At the instant the elevator has a downwaxq+kv75 numn*f4 y jv7rd 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 g42u xzfom6x5bathroom scale in the school’s elevator. When the scale reads 520 N, the el o2u gx4zmxf56evator must be

  00.12: Astronauts in an orbiting space shuttle rso (uxs9:s,ogyu6j4are “weightless” because

  06.16: A scientist in the Internation3*rb fa,- td5 3vb dy)dthu,cial Space Station experiences "weightlessnessi5f 3-*t )dth3u,rab, dvd bcy" because

  11.10: A string of negligible mass connects an object of massgsp w7.6, rlxy 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 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 ther6p,w.7y xlsg relationships between these forces?

  12.10: A string of negligible mass connects an object of mqf;: 5 **hpt. wk5gl,bt qdcivog/ol;ass M=10 kg to the ceiling of aq,*;d *lpoc w.g tvilg fkbt /;oq55:hn elevator. 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 horizug,:aq t kmpv:r 40/g2m9ermqzw: b6sontal frictionless surface are connected by a massless string A. They are pulled horizontally ace6 rwz :m2u,/:b m9 pat:4qmr0sgqgkvross 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 oa(/8*glp ziwm n a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a consta8( mag wp*z/lint 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 horizonta 85zd3st3k dmyl frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constan tz8y3mkdsd35 t 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 ona- jo5c x:v9yy a horizontal frictionless surface. A 36 N constant force is appliv y o5xj:cya-9ed 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 connectedm 8 *kkq+5rmka0 gpq .jfdqb70 by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is nd gf m5.akq*pk bkjr07q0m+8qegligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal s4y2qpl hek7 o-urface 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 horizontalk yep2 74olqh- 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 s)p5 2ae peu4nc3s oa1qutav,:urface. A constant 35 N force is applied to the right onto block Y. What is pauu)n24 3ao5ts veqe,c1p :athe magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the other en m5k(vkw 3ij8;w(;s t+j) a)dmhlhnwmd is attached tow;tks hwlj 5 d((mhm3m;)av)jwn8+ik a mass of 1.00 kg. The rope is 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 it1;5s8*lwvox;yc s5*tsd yqh 8gqe)yc s ends is hung over a frictionless, massless pulley as shown to the right. Whats vh* ywss51*eg8dcl 5tq;)xyc8yo q; is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as opjpn7e b8j 2et+33i(ee(fx.j3kl z ishown in the diagram with m1 sliding along 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, lxbee zet8j3en73oj+.i k 2p( ipj(3fm1, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced on top of9q*w.l a rxp*a 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 between9 rpaw*q*.xal all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up aum uu:yy 6zh)z fl6 yuo-*o5hk90oh+i n incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If ty oou6)u*u :iu05ykmz-hhylo 6 +zh9fhe 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 9wd,n 9j ojy4qw ig6w;horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of w 64ojwjq9,; inydw 9gfriction 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 gravitationa4 qs e7qp,tee va5.i2hl 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 the person? The +x-axis is directed upwa5qe7p2 eq s,e.4viahtrd, parallel to the incline’s surface as shown in the figure.