96.30: An 800-kg elevator ac) fv8 t3f nk*qsfp/52wcqai /ccelerates 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. At the instant thdt98j1/mt g/9fr o ysee elevator has a downward acceo1t/g /t8eyjm9d s fr9leration 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 schow 9 qw aft,viqj*j7t9:ol’s elevator. When the scale reads 520 N, the elevator must be jwwq9q,j7ift:*ta v9

  00.12: Astronauts in an owx l svx0u;td.0nm;)frbiting space shuttle are “weightless” because

  06.16: A scientist in the International Sp z-r :9:siugx;hfa2t i,i8f cpace Station experiences "weightlessness" beci 9c 8ag h,p-::fi;xus ri2tzfause

  11.10: A string of negligible mass connects an object of mass M=10 kg to the -63g4wayh br/ j tq4fjnq:z1oceiling of an elevator. The elevator experiences a cofg yb w o/4qq-3th6r1z4j:anjnstant 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 connects6c12u t nuv gmin ,69eejxun4) an object of mass M=10 kg to the ceiling of an elevator. The ele9 4x1gm6)in2 vjteeuuu nc,6nvator 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 eu f,w.c:;5oleq x ce3mass on a 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 acquew3e5lc.of ,;: xecceleration 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 frictionlessytpi/l3 iln:+l lg:x* surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration :gix/l+3*:ynl lti plof $12\; m/s^{2}$ .
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 are com3it ytn1te.ilc5 v/5nnecl tvttii m3.55nye /1cted by 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 horizontal frictio;dnckwce nu9q m:h72 8nless surface. A 36 N constant force is applied to X as shown to the right. The ude2wq; c8mn:n9c 7hk force exerted by X onY is:

  97.31: Two blocks of massl+d gyrn/2 axdn*p) xscs)a +4 1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A)dxdp4/c s y nn)l*a+sra g+2x force F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are ezt n7 g9: 619w2nnn+svkbg aw7qbka/accelerated 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 box puln9:6 1nww/zn 7 b gqa7 bvtesgk2k+an9l on the smaller box?

  17.15 : Two blocks X andY are in contact on a fric4f*i 6ds lic.jtionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that b lficd*. 6i4jslock X exerts onto blockY?

  94.25: One end of a massless a).ry* +qresl rope 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 frictionlqs+ rl* .ea)ryess 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 hungik *a u+uatmy,g de234hfl;b- over a frictionless, massless pulley as syl k4 -,a +e23fauguh*bt md;ihown 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 anfpvo v*6)lr*p 66yo 2ryptj.ld arranged as shown in the diagram with m1 sliding along on a frictionless surface and v*o6 vlf y.l2tp6po)ry*6 rj pm2 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 mass m isplaced on top of a larger box of uz kz1vgs(ml6r+ b-,p 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 accellgb+r z-1sm( 6vkzu,p erating the smaller mass?

  17.25: A box slides with uniform accelerate8h e)lot0)5sd0pnsh ion up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before comeo0dp ))nl se0h5t8s hing 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 initu dxpw.da8n07 cg 58j5gm7c2pzb7e ikially 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 chan852pwx 7z7ca8ddk0nbcp7ggui5m. ej ges 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 incli 7 sgodz14vz.fu 5hw,yne 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 restz5s4d. hu, z7gfow1yv 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.