96.30: An 800-kg elevator accelerates downwa ,:*3suh naxkyrd 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. 4iqlfkq/, +uxp 5-e otAt the instant the elevato -ktqqlp +fo4i,exu/5r 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 stanwl8brw; 49npz ds on a bathroom scale in the school’s elevator. When the scale reads 520 N,4l zwpb;8wr9n the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “w.,a i- ip,:e-:drxtldtwedb2o h 3-vseightless” because

  06.16: A scientist in the International Space Station exxgp8h o 9n7g- 7u1-xpi y.ftekperiences "weightlessness" bie tp7g-8ox1nyk xug9hp f-.7ecause

  11.10: A string of negll56srw/nu buru**m p7igible mass connects an object of mass 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 ac mprl*s/u 6 57w*runbuting 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 tpxei3 1z)b e ,0weoed1rlt7-sku- y2she ceiling of an elevator. The elevator exper xisu,erl0 z 12e)ko 1- y7-pew3dtsebiences 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 frictionae6m,o mj.:*f tb4 espless surface are connected by a massless string A. They are pulled horizontally across the surface by a second a,*fm6. joseptbm 4:estring 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 a4y3e5. pr6tdi a) tywk 4 kg 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 with a cotrika5d4) ty 36. weypnstant 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 ared5nak)8y yxhf6,r)z0d s4vqn connected by a massless string A. They are pulled horizontally across the surface by a s ydz5n4 nqdx6 r,)khv)y0sfa 8econd 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 horizont8kadkr16dnj(*jx8 ziwoik (i: lc5a nk2/t7xal frictionless surface. A 36 N constant force is applied to X as show iann6 8*(ikjkk1x/dd 8w:l zixa t (7jkoc2r5n to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg aec it3uv5 ,fd30 qw4tvnd 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 frictiou3, w40fcdte i35qtvvn is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to th)cc b0ol.yw(dp0qh 8je right on a frictionless horizontal surface as shown. The larger box has a mass of 9 kilogra0p ylo(ch8q0bjc). dwms 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 the smaller box?

  17.15 : Two blocks X andY are in contact on a fricxanf);gk 6.zbtionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is thefg.x)6;b ka nz magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless ropojnd 51 (zsar0),hoys e is attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope (aj z ,ho) 51oynd0rssis 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 3.42kf t8h b4bmv0 kg on its ends is hung over a frictionless, massless pulley amfv8tbk442 hb s shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 andvp :(+dt( rprz m2, are connected by a cord and 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, m1, and the tension, T, in the cord were k :t +rzvrpp(d(nown?

  02.42: A small box of massi 7dudx)+f (ul kt0ue dia;0,t m isplaced 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 coeffic+kxt i(d0;0 fd7d)ita,ueul uient 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 joqu(vvxttj i 63u ) hxk.v4-+an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 j v xq-ht6.(k)uiv4v+t 3oxjubefore 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)v,5hgc)opk g/vav 6 k initially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefg)vg 6cp5v ha)kk, vo/ficient 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 frict btdfm+lz;vpz4- 3,dsf q() dyionless incline has a gravitational force,a normal force from the incline, and a force applied by a person that all zmzq3-s ;d ,fdf)tvd +l y4p(bare 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 figure.