96.30: An 800-kg elevator accelerap 5se;6vtv*a btes downward 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. Abund7)87yjr-d bk fp. t the instant the elevator has a downdr8 7d ypb-kun.)7fjbward 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 bathro3d5ld p( vjn1nom scale in the school’s elevator. When the scale reads 520jd5n3p1d nlv( N, the elevator must be

  00.12: Astronauts in an orbiting su o z9w01ney8mpace shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences "weightlessii04j 8 *zvjfelw8d ,qness" be*lz04jij i d8fwv8,qecause

  11.10: A string of negligible mass connects an object of m1ws go rr2ad/jqn)byl/4*z , uass 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 betweensna1rdbj/qwrug 24* )lo, / yz these forces?

  12.10: A string of negligible mass connects an object of mass fz36dah vae 2zdo/rj -s51hb* M=10 kg to the ceiling of an elevator. The elevator experiences a consta3z hh/ *bf2 1-6jdsrozd5a vaent 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 masscencbo* 1 4y (s 8yqhezl4u7x6 on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a sy6e17 c4h4(c s equolbzx*n8yecond 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 kghax2p 7uj8)j r mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B withp8uh ajx72)j r 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 k* w5zg qqx4i6 fqq*s9/ uyts3f-kz(qwg mass on a horizontal frictionless surface are connected by a massless string A. They are pullqk qxu3qg*z yisz4 -t*qw9f5/ w6f(qsed 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 horizontal frictionless surface. .k gld+pm iep ,6m.*cjA 36 N constant force is applied to X as shown to the right. The force exermpjcd ..gk+ lm*6p,eited by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected bpylqd ytyi8ils(+mpdsol .6c 4,p 65*y a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. 8 pmpt4+ 6 ds,yildi.ocy*plly 6sq(5Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless hor/tb* lylxx . uh)a(z iqin0c8x;ir13jizontal 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 wh*8lijz l/1hux; xc( .nrqxti0a iyb) 3at force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless horu gb(0wg)h u z+xmq69bizontal surface. A z (ux0u+q96 bhwggmb)constant 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 malx.ziko 8; :;bzw o0knssless rope is attached to a mass m; the other end is attached tokw;x8ilo0:bn k;z. zo 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 x9 z ,/gf+cm/z-kj xwi (a+p 9ekonlv4its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the accelerationk+,i 9nex9z/v (w lj4+ogzfm-a cp/ kx of the masses?

  02.36: Two masses, m1 and m2, are connected by ax;(gk 9p*4 nu5 1(bin mqvoxka cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a li1b5 qn 9(u i;axvk kmg(x4no*pght 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 mass m isplaced on top of a larger box of mass 2m as e 774jbe sb1bwshown in the diagram at right. When a force F is applied to the large box, both boxes accelerate to the right with the same accel7ee7s1jbbw 4b eration. The coefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box has an 67gss.j1fxtf0gd r jdx;:* juinitial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If jrg0jj 7.1g x:ffddu;x*s6 stthe 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 horizontalvvl043c3 nmvx; cdkt )zih19j surface. A constant horizontal forcevzix)cm0 4;931nkvvjd tch l3 of mg/2 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 grt85+g ;zimy msavitational force,a normal force from the incline, and a force applied by a person that all are equal in magnitude. The mass r gst85+mi; zymemains 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 figure.