96.30: An 800-kg elevator accelerates dookqn8d:0zx7 ajcle64,x(9l8 a 9emp5 alyhznwnward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands on 0 ew)nc4cci :7ras iye(ppc6 .7t1xm xa scale in an elevator. At the instant the elevator has a downward accele77mrxa: 1i.cwt0n eic4 )pxcpec( 6s yration 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 school’s ev/) p. 1eta. rywf1iurlevator. When the scale reads 520 N, thv.1a yrif puw/te1r.) e elevator must be

  00.12: Astronauts in an orbiting space shuttle are “w4n8 cj;jo 4ja6iyw2 qleightless” because

  06.16: A scientist in the International Space Station experiences f5 jue7 a o:)xl-fyv0c"weightlessness" beca 5ecf 0l):fa7uy-jv xouse

  11.10: A string of negligible mass connects an object of mass M=10 kg to the c-y/u3edn 0oggd a ue*9eiling 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 ydgao e3u-9ngd/u *e 0these forces?

  12.10: A string of negligible a1 z m:a,lasm1dmb+ a7x/ync; mass connects an object of mass M=10 kg to the ceiling of an elevator. The ec: a yml1 , x;s7az/mbaa1+ndmlevator 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 fkn6v:0 ib kr+on a horizontal frictionless surface are connected by a massless str+kf n6 0bik:vring 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 yw e*617ho0c1o * rjqkm at0fqfrictionless surface are connected by a massless string A. They are pulled horizontally across the surfy*7 hemf j0t*160k acqr oo1wqace 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 frictionleskwa8 l r43fdr,d-pcd 9s surface are connected by d lpwdrkfdc,-89ra43 a massless 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact on a horizontae46v8f o. +adr y+skxdl frictionless surface. A 3vyxe.dso+r86d 4ka+ f6 N constant force is applied to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass i,h:/*;4nra g )ts udk ,wt6c,qbikza 3l.zkq1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction s ,qr*i,wq )s ad/4kbzn6kitu kht;,3c g:z.alhown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated 98v l)9lykocwb mq-hug:i4s,to 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 what force does the larger bo4l9gk c shbuvio8-,)qml9:y wx pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a z*j4mhqu*-vp frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that blocvqup*z-m 4j*h k X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mash,iyo ,ops)- 8ztd qycub -b-vb2d5k)s 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 aciu d2k v y,s8-5-ybop)cbd,qbo-zth)celerates 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 endmckf;5du9pqh b)a,qd,nh22 t g bo +q)s is hung over a frictionless, massless pulley as shown to the right. What is the approximate magni2;, )q+q2bhpquac t5bd)d9 ,fmhngkotude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shd9 be f un+u+uu17kigm(ml4n* own in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be the 9*ed(umnikg+ bm +uu1lf4u7n 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 26b -lhbpr9n ; uk2nrx.m as shown in the diagram at right. When a force F is applied to the large box, both boxes accelerate to the right wit; u .pk2n9rbnbxl6- hrh 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 wi2 wg-zztxl3su*q up6 -e4cj f.th uniform acceleration up an incline. The box has an initial speed of 9.0 m/sxte fcs- -4p .2lz*g6uz3juqw 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 fv )iul qb o w,5)hl8.(wlve8za horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surfa lz i))5v.(8,l w vu8hbfwlqoece 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 frictionl4n arer hcn;ryc39 2ywh+3y :4arrw+r ess incline 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 incline ma r 3r cw:3r4cnhrya;4+ew2ar9hrny+y kes 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.