96.30: An 800-kg elevator accelemsk * )fmtn1x;rates 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 aljmwdf7fo*f1 0iz g91 scale in an elevator. At the instant the elevator has a downward acod 7gi lfwz01fm*fj91 celeration 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 standm/krvx 4;muo 9f;k )sgs on a bathroom scale in the school’s elevator. When the scale k9fkvu;mog x)/r4s ; mreads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space sbld*v7qf1k-nd rq3 +qhuttle are “weightless” because

  06.16: A scientist in r9a,4x/0ogdhu l w0a7 fk mmx/the International Space Station experiences "weightlessness" becaukxaw 0gl9ham7/r,o mux 4/0dfse

  11.10: A string of negligible mass connects an object of mass M=10 kg to eyb; neo(/g-t 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 be;t-engy( /o 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 bvurc u ktl9*hq3 e:1sqg+ t*3mass M=10 kg to the ceiling of an elevator. The elevator experiences a constanhq*ls*e1q3kt t3 urvcu+:9 gbt 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 massyn,8 c zqh1,+ rohmwe1 on a horizontal frictionless surface are connected by a masslessoh, 1yc18,n qzhmewr + 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 massl pw )h)rw72es on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B wshplwe ))wr72ith 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 horizontaj7oaqw)sp gyn7t, sij*wl1(3hp1 v 9cl frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a sjc17ns 3 ywa *ipjhl9)gso7q1wv(t,p econd 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 cvf:c pzzi f0g/q ld.y4qs, 3s6ontact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the righ46gsf 3vqlzqic, y0/ z:fsp.dt. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a string wy ;)ynithd6v/ dyj2 m)sw -e(4it. ojshich has a tension of 2.0 N. A force F acts in the direction shown to the righyts)s.(dtyhw;ij/ e2d)n6vyom4 j -it. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on ang+h bs-qn z6, 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 the smaller boxnn, s6h-+gbqz ?

  17.15 : Two blocks X andY are in contact on a frictionless 3.mtmv s:mxgm s,(*bi3j r)ubhorizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnim3sm*.:tg)j m svb3(mxir,ubtude of the force that block X exerts onto blockY?

  94.25: One end of a map(aozyb:2c d8 s :8lhqssless 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 sh:lzpcba :2 (8so dqhy8own 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 zrq,y)6 o(j3 g 6vqn),zcf+l i3ahtgckg on its ends is hung over a frictionless, massless pulley as shown v+iq6q ,g)h oza3 ,n)rljzcty 3(f6cgto the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 anm;e1n ktvl 833xj-p kpd 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 fallingtpke n3j;x8 k- vmp31l 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 21e b)+6uvqkual o7ys0k ert *-rvar2 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 2kru 21b 6 0kae ysreo+vtvu)*aq7l r- between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acs3t- y /jq*.ch:odvejk hsu.-celeration up an incline. The box has an initial speed of 9.0 m/s and rises hhd -sqj*u svjoe y.t .:ck/3-vertically 2.60 before 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 initially at rest on a horizontal sq72 ,yzeom2.)tqbd9pnxd c7n urface. A constant horizontal force of mg/2 is .p db27nc,d79qxmq 2 n)eztoyapplied 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 -tr*p 0guu2g1sk6 oltgdwh-*5-ze ei force,a normal force from the incline, and a force a-ztwoe sgtpe kugh dg2-i1*6u* -0 l5rpplied by a person that all are 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.