96.30: An 800-kg elevator accelerates dowmb w-o-t)u r/cnward 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. 7)52cxbal jcf :xf)an At the instant the elevator has f: 2lxf aj5a7cb c)n)xa 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 stant0asf witt 82a 3e5ly3ds on a bathroom scale in the school’s elevator. When the scale reads 520 N, the elevator mustsl 8 ite2at 3wyaf0t35 be

  00.12: Astronauts in an orbiting space shuttle are “8dsiool c-wpf9ad ://weightless” because

  06.16: A scientist in the Internation6h6y3dtm fu c0al Space Station experiences "weightlessness" beca 66tch0md3yu fuse

  11.10: A string of negligible mass connects an object ,3m) ice1bm4ift npqsy 3lmdpa4(8w/+lebe5 of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward speed of 3.0 m/s )apnsi3 cmt bi 4,l8pb 1+4/fe(3ymw5edqelm . 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 mass c.df2r3(bmdm k8pff+ oonnects an object of mass M=10 kg to the ceiling of an elevator. The elevato fof+d2rm.8fb(3pm kdr 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 o g+as)inngv* ) +iim/horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleratin)a+i svgi/o *mgni)+on 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 g03 imyux4x sqq ()b9 dtxf.6oon a horizontal frictionless surface are connected by a massless string A. They arexym0xo.qs)q 9u tx3 f( dbi4g6 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 kg mass on a horizontapaoi iv6 e4y*p+t3pk dju8( t-l frictionless surface are connected by a massless string A. They are pulled horizontally atpp ik( ji6uoe* -dtp+ay 4v83cross 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 f7u ao6rvyi *1o .6qn1nm7qo0 /hnftx arictionless surface. A 36 N constant force is appliedoa .7u1o0n*h7o qnv1 6 xrafi/n6t ymq 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 str3r:d 7 b8 vt,onimt+/h6nue hying which has a tension of 2.0 dvy3umo 7rih tnne,:/tb 8h6+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 frict (- deqs3v 7nk8ocw,kuionless horizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilograms. I -qu,k e7w3(c8sd vkonf 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-7d )sn+ggao ih1 dm8c a frictionless horizontal surface. A constant 35 N force is applied t i-acgd+og1n) d sm8h7o the right onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless ropca4,adc+oz,ejx7 n f/e 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 accompanyi,do xaecn jf7ca,z+4/ng figure. Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and26o(m pgv np2m,lvy;9cqi j;w jlk; 2c 3.0 kg on its ends is hung over a frictionless, massless;mn lw(jvcpg 92 om jqiy2,lv;cp62k; 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 arrw 8ep0(c l-vqey eiww ,(;b3ruanged as shown in the diagram with mr, uylw; eiqe bc(3we- 0wpv(81 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, m1, and the tension, T, in the cord were known?

  02.42: A small box of mas m89p3f fhvhg,s 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 th hv3mfh pg98,fe smaller mass?

  17.25: A box slides with pys/;bqah0 hu s3x)(u 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 angl bp;h(ha3us0qs u/xy) e 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 horizo;gzznaj r-) (yvd(-(qwvpo rsw72po ;ntal 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 w)dz g-j arv ;(r2(q (snyw;o7wo-p vpzith 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 gravitationaqcdr055 etetmfm6q : 7l 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 andc mft5:e57me6q tqd0r 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.