96.30: An 800-kg elevator zj, 43 ohvckp) 4t+v- cwgoet;accelerates 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 ths2va0ket6 xvp4 q(;xq e elevatq2pqxk4 6s 0v(ve ;xtaor has a downward 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 acj(w;hegw-5 ) v )scqbgwvp5- bathroom scale in the school’s elevator. When the scale reads 520 N, the elevator m- pgw- cjb 5; s()ve)wwgvch5qust be

  00.12: Astronauts in an orbiting spaceg ea3skto.(y8 shuttle are “weightless” because

  06.16: A scientist in the Interna x-)6sxd;zge;ck p8in tional Space Station experiences "weightlessness" beck)6s ;x;iep nz8x-dgcause

  11.10: A string of n+lohhi 8mqfy j/)5 alai xo8/.egligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The aom 8i 8+y5johh.lfi/q )alx/ 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 these forces?

  12.10: A string of negligible mass connects an object of mass M=10 kg to th87i.udei 4 luyvl;fblf z.0 8xaha+4q e ceiling of an elevator. The elevator experie qy 0ax 4ldhuvb;8+ff.liea4u lz8.7i nces 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 horiz ezbc+5gv.3k bontal frictionless surface are connected by a massless string A. They are pulled horizontally acrkcb+. e3z v5gboss 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 frictionkz ihhe/6d0)hless surface are connected by a massless string A. They are pulled horizontahiek 6hz/dh)0 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 frictionlvm7r zs -;izt hduc4./ :s).)wym tqqless surface are connected by a massless string A. They are pulleh:z-.yd4vmuq)s z mi;.wl7tcq /rst) d 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 ipwh5;7wjqat + wnfm8(n contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the r5pa(w hfj7q;+m8wt wn ight. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg ak- 4d,mh0mhjlj l5+4c/b/x jv9adq zare connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to th dz0v4akq/5hjmj+j m4hl9ax, bcd /-l e right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to ti;f iug+1syh -he 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 pull on they- h1g;i+ifu s smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless horiz doxkn3: oxojzlr.1j8 16n:wbontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockYl. 8oxn wxz :b 6rnj1ojd3k:1o?

  94.25: One end of a ndipzl;w16aa*lhbpo 9.6vz(massless 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 frictionless pulley as shown in the accompanying figure. Mas; 1wplhaz9oi 6z .6*na(dlbp vs m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 5 jqhvzr(63h 4bb-jfjkg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximateb4q rj bhfv(56-jj3hz magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shmfyl+ wb199bbown in the diagram with m1 sliding along on a frictionless surface a91l+9fby bwbm nd 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 known?

  02.42: A small box of mass m isplaced on top of a larger box of mass 2m f5(h bg:;2rac0i4 1mpox rocr3v+udp 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 acceleratiooc0x4orh 5pi (pam3u cr;2r+bdfv:g1n. 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. Th0 alzc1o/f:8hw/veqr xrv;7 se box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. Iaxf 7 r;vwh1 szr0:ov8c/l/qef 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 hz1jfc8;m:x/y qmo 1p yorizontal surface. A constant horo ;8yy/f1pm jm:cq1z xizontal force 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 j33fzpba1rghm9+ z1 za 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 reszz j9+z ahfr3g3mp1 b1t 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.