96.30: An 800-kg elevator accelerates downwarqfldz-v s6k v.:1ubz-d 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 ins-vy ;sx1hma xk820x lntant the elevator has a downward acceleration of xnvx; -m k2xy01 a8lsh$1.0\; m/s^{2}$ 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 sshbvg-br: ol/o9 4j)e8tyv c7zer f189)pbcjchool’s elevator. When the:bo-vc8 o tle)c14e hj9zybgrv8bfr 9p) /j7s scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightl6o n1j x7+ypml0 tqt frfm4(i;ess” because

  06.16: A scientist in the International Space Statiosn6),..dn + ctmahoxhn experiences "weightlessnesn.so+c.)t6 ,ax m hhnds" because

  11.10: A string of negligible mass connects an object of mass M=10 kg6hj;l n,c+ fltei 3ky0 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 k 3ci;t+ny,e0lj lh 6fnet 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 tvfbf l0,5 8t z-6ipcoto the ceiling of an eleva-ptc 8 ,fb0fi6l5tzvotor. The elevator 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 horpb b -:h/f4jsfizontal frictionless surface are connect-hbb sp /4j:ffed 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal frictionless surface are cou4zj24l, ( x 3uew vrw,:cspkml 8xq7tnnected by a massless string A. They are pulled horizontally across the surface by uwxx2lj3rz :umq, ck(4v7wtp,l es 48a 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 hori;xsc mi(,, yr8dezh.i po f;d.zontal frictionless surface are connected by a massless string A. They are pulled pi,,zs fxre i;d.;cdoh( .y8mhorizontally 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 frictionle0)b ui55vn e1vzlp8cpss surface. A 36 N constant force is applied to X as shown to the right. The forcc u5v5lpn8izpb 0e )v1e exerted by X onY is:

  97.31: Two blocks of mass 1.0 kggk0 6 :grt7nlexx -8lv and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, whatt7-6gegkx 0:8l v xlnr is the value
ofF?

  99.12: Two boxes are accelerated toq5szz)k 6 k.he 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 pull56ezks ).hk zq on the smaller box?

  17.15 : Two blocks X andY are in contac i -+lvfbp*zk:ikrk658gegp +t on a frictionless horizontal 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 blockYkv-+ekk*g :p5 l+ig fr8z6pbi?

  94.25: One end of a massless rope is attached to a mass m; the other*43k wl-vd4yd soc1k g 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 accelerates dow-wld k d* 34ckygo4vs1nward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and h31azn22g1jf8p aim h3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is theapm fnai8z2h 2 13jgh1 approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord ab i1, l5noryqlv q5(-cnd arranged as 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, l (5n1-lrci ,vyb 5oqqm1, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced onp sx+yx+dhx( t);4el:lblov k;5v6 cl 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 surfaceo(4 ex+vv)6x 5ly kc:pl;;sllbx dht+s is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration6;i gjkwu-k 64h 2-i8a/e qcm7fljf5pi dspx. up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. Iu6k-pcidkwle . x5 iigj- ffs6hjm;p7824q a/ f 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 regvrs d 4k6am)(st on a horizontal surface. A constant horizontal force of mg/2 is applies4k)a(rm dgv 6d 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 gravitational fo; q*4dc bh)uexrce,a normal force from the incline, and a force applied by a person that all are equal in magn;c h)*duqxb 4eitude. 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 figure.