96.30: An 800-kg elevator accelerates downw zmi(f7+y k2.)h ukr4,oaceyjard 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.id9*bk3a+oj f At the instant the elevator has a downwarbjk od9*f3+i ad 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 a bathroom scale in the school’s eb3a bie;+u 0jk:rw-un bvd5b2levator. When the scale rea +a -vb:riu3 bbeb5wdj2uk ;0nds 520 N, the elevator must be

  00.12: Astronauts in e;av bwlp .pg:r)u1l,an orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences dv-yuq. s:o)c "weightlessness" besquvy . ):dco-cause

  11.10: A string of negligible mass connects an object of mass M=okoz,5p(e -ebmzax;;.ko * sd10 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 k, kzda( -s*bp oo;ee5 .;xozmelevator, 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=10xn0j khk-/ 0el kg to the ceiling of an elevator. The elevator experiences a constant downward accelerak0ln/khj ex0- tion 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 frictionless surfacekg7.o- 7 f-wzjmrs;+h cd6eqm are connected by a mae7-z.s +qfr-k cmw m;ohd76gjssless 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 frictionle)-n9wgar:q v uss surface are connected by a massless strinw9gq-u )anrv: g 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionless sri+y/k(4jg(z+-s9u+ bf/lkjv a ag tu urface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with i(+ta/b l kau gu z+g+/fy-jj kvr4(9sa 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 2qgzjq0m 8p8p andY are in contact on a horizontal frictionless surface. A 36 N constant force is ap8zjqg2 0qp pm8plied to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a striane9y9hysp/-8: mk qk p: r8zing which has a tension of 2.0 N. A force F acts in the direction shop- a/yhi 9qkn :88m 9ykrsp:zewn to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a fricti9fny*aqaec os*z,db: l */qh ;onless horizontal surface as shown. The larger box has a mass of 9 kilogzf *yqq;dsc*ole*/ ab :9ah,n rams 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 ad1 iml 9y:n-ka3 /lacxndY are in contact 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 Xlc1a:klyi ax/ -3 n9dm exerts onto blockY?

  94.25: One end of a ma.j6tsyic0i( 4 usl -csssless 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 pulle s .0cy(ltii46s- scjuy 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 o:f 8* ,ckfzqmgbn 0sg5n its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the ac :bk50gf ,sf* z8cngmqceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and vyp5 cshs. 8e5 1o;k+xriglo2arranged 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,;5+cl 52ysohisrk o 1. vpxge8 T, in the cord were known?

  02.42: A small box of mass m isplace7tk+pyw hrgshpm z(5j aq c8r7 655mz/d on top of a larger box of mass 2m as shown in the diagram at right. Whek5 6p8r 7/5cgzhha pmrm sq+5w7t(yzjn 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 accelerating the smaller mass?

  17.25: A box slides with uniform acceleration ua * 8k7+zegl nt gz7i2apzt0r:p an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the in:i ka pr28n 7ez7taglg+0*zztcline is$30^{\circ}$, what is the coefficient of kinetic friction between the box and the incline?

  05.44: A box of mass mis b,5dwlyf ,1mi/i, 3 q1ruku fpinitially 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 f frimyw f3i/51kp ,qb,u d1,luriction 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 3 0lbjaw;n:yngv 81s rgravitational force,a normal force from the incline, and a force applied 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, parallel3 1gla8jvns;yb w0n:r to the incline’s surface as shown in the figure.