96.30: An 800-kg elevator accelerates downwfe-q9so, xv aukep/;9ard at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stan: )cxjb,um( zf:6qycv ds on a scale in an elevator. At the instant the elevator has a downward accbf:z6yc cqv(xm:j,u)eleration 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 brag.wp r 8i 6m-,*a:d8mutfdstands on a bathroom scale in the school’s elevator. When the scaltrm868 if.- pgaumd ra,db:*we reads 520 N, the elevator must be

  00.12: Astronauts in an orbit7iyq1 a/xfs-xka 3q ,1-sa,0tftu zyking space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiencekjdmo9(e 10m uwdq./xs "weightlessness" because(d/d eow1.mx umj q9k0

  11.10: A string of negligible mass connects an obj ;ndjb.f wu)rmv -x)(od5(dumect of mass M=10 kg to the ceiling of an elevator. The x(b dd))rw(ju.;do m nm-vu5felevator 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 these forces?

  12.10: A string of negligible mass connects an object of mas op9-r gzop:h4b j4m8cs M=10 kg to the ceiling of an elevator. The eleva9 :c8 zbj prpom-o44hgtor 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 horizontal frictionl ocm+d;6q u degiftn: z.,)fp8ess surface are connected by a massless string A. They a+ dp;e,fodfm)g u8q.n6zc ti:re 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 frictionless surfa7xqwy9/ost hz *ty)zmc 1 x9n7ce are connected by a massless string A. They are pulled homot/hs1 z79w79yycx qn xz* t)rizontally 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 frictionless surface arebpsq9aa9k+ 4h connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleratioha9k 9s bq4ap+n 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 fimwfbdb:m 20niy( 7nu.h0pu5puyz5 0 rictionless surface. A 36 N constant fon.5m0fmb pw nuip:(y 27yd0ibu uz50hrce is 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 b6*qhuxun mdghd, .7 (wn0a b+yy a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligiblegyh d bu.*67,n+d x 0qhuamn(w, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal sfnci:n:;pnu4 sn o2 y/urface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilogram p/:fcu:nn4oyins; n 2s. If 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 ar/ja (cyj ;r1i))xmrzfhbf (a(e in contact on a frictionless horizontal surface. A constant 35 ixyh/jcjr(b;f)r1f)( (azm a 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 attached to a mp/) cofu,,fp hass 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 acco) o fhpup/c,f,mpanying 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 h63z lyjjxna(i srvbg /1po0(hp3d/t6 ung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the /33 bhdv6j/zi6g1p x(rnotsy (pj0 almasses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged asmk0j4 4hg:9j kpkgr;u shown 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, m1, and the tension, T, in the cord were krpgg9u 4k:k0h ; m4jkjnown?

  02.42: A small box of mass m r2n;ha+ybvy +61agto6f 5pr0 az it,eisplaced 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 survir2bay+n1t prfht6,6ea zg; 0a5+yo faces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with unif2u9ozx/j h - lzln(7mform acceleration up an incline. The box has an initial speed of 9.0 m/s and x/ z2nlu(9 lojzf 7-hmrises 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 inil v+ ghk5ea(5v9(rbdmtially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface change9vd5 egmbl5 + (hravk(s 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 gravitatin7 )8,qmjzo0 rl a9/gtvii7ju+yf7at onal 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 upward, parallel to the incline’s surface as shown in the figmtn9)v7 8t 0j,7jq+ aairl7zgy/ o uifure.