96.30: An 800-kg elevatfnbj :e)9/xwx or accelerates downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stama8s qr.lu1fz*jem.5nds on a scale in an elevator. At the instant the elevator has a downward acclm51 jmqus*r 8 fa.e.zeleration 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 scao9( fml2 7 owsv/xu-zulq6t e6le in the school’s elevator. When the scale r(uol6u w6 lztvfe 9m xo/s7q-2eads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “we ,,4nyt8/ vtmen avq(4yl6,kqe)ruui j3 lk*mightless” because

  06.16: A scientist in the International Space Station experienceetx/j1m/d gh96 0*v ti2cfpw wnmh1u)s "weightlessness" 1)dj2v 0hxuw9n1gp/ fwm m6h tt/ ice*because

  11.10: A string of negligible mass connects;ubr7+nna )on an object of mass 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 the relationships between thesen); +nn7a ubro forces?

  12.10: A string of negligible mass connectov; (q+w tk5bxs an object of mass M=10 kg to the ceiling of an elevator. The elevator exper;owq(vxb 5 +tkiences 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 surrcgslhw+* 5p.pmry9k0kv;zf9 m* 6w jface are connected by a masslesszrpw;hym gms+69 f* vp*l c9 .5r0jkwk 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 B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal-.zmkbp2s ;e -.uw 6p(xskkof frictionless surface are connected by a massless string A. They are pulled horizontawk s 2o;sk pb-ez6.mf u.xk-p(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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal ozu 2/qpmu a)(frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acz2p )(uumqao /celeration 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 contac0vgr fd(h 5r tr7+)(zmfo8ygtt on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. Trtf ogzdrhf0 vryt5g+)(78 m(he force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg anjj c.hs+; )juad 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 friction is negligible, what is tjuhj)sa. +c;jhe value
ofF?

  99.12: Two boxes are accelerated to the right on a fri 2p+ f /,it7qectb;o2vnq)i bmctionless 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 lq /ctvmbn2t,fi+i o ;7) qb2pearger 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 horizoej6a sp5r (c 7oqqe s2sq2,gd3ntal surface. A q5s(pj cqsed23 2r7s 6goe,aqconstant 35 N force is applied to 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 rope is atta-uwv j3a7sh;p ched to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a masslesu-7 v;hw3a jpss 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 its ends is hunp8pkawb5chs9(2c 3 3s l 3alxrg over a frictionless, massless pulley as shown to the right. What ispcxh3srl25s3w8a bkac9p 3 l( the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, mmugl(4e iou wa va-t*79o :m*z1 and m2, are connected 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 wo(u4 t* a: lo7vi9 -wuzamge*mould 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 ola517 wk.bmeu f 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 the smallukm1 l 57eawb.er mass?

  17.25: A box slides with uniform acceleration up an incline. T4*-avf :7jaz. ryzj+okzy w7 fhe box has an initial speed of 9.0 m/4yz:j7v kfo *+fza7r.jzw ya-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 horizontalyk7h--hjw6txfc8o; )61ytk 3 cqigl t surface. A constant horizontal force of mg/j 1cwt6ho; txy t6-)kk7- 8gfylh3i qc2 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 f6kre1e b5+p ul* wy.qxgjhe, 28manu/c5 d3uzorce,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 mun.er 5c2pu mek*y /h+,8al1qxe 3z dw5 bj6guakes 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.