96.30: An 800-kg elevator accelerates dvld h 1-1 nhft7,on6y nopm9o,ownward 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 nu-3;agyhtw q/(oeq7 elevator. At the instant the elevator has a downward acceleration of ;q- q/gu3(woh yean7t $1.0\; m/s^{2}$ 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 scho5os -0ne nfmj(ol’s elevator. Whefsm -ejnno5(0 n the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space s;eq(.;wnimj u8 tej0ahuttle are “weightless” because

  06.16: A scientist incuj* ;-zrf28 jv tm/d;a)pf tj the International Space Station experiences "weightlessness";;v/*2 8f tj-jfad pc mrzjtu) because

  11.10: A string of negligible mass connects an object of mass M=10 kg to t)xt r8 :e7nbwshe 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 ths) nw8b7xt r:ee 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 a0oy *yjzy- g4to the ceiling of aay-0yjg* 4ozyn elevator. 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 horizontal friction+i l5,mkf rr;wxi,eo0less surface are connected by a massless string A. They are pulled horizontallyri, rk05 xolfm;+ ,iew 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 frictionlexr qe2ck rh)q 68hoob( )f,x;1dr8conss surface are connected by a massless string A. They are pulled horizontally acro c n6x 8 f2qxhro);qco,rbh()edr 8o1kss 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 frictionlew6s/d*vfrrc9-lh7nct6lj-o evx 9:l 9n gb /mss surface are connectxcegwd*/ 7 9rnfor9ns/ c--9jlm vv6t:h llb6ed 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact3 9ioai xsvx9g34cg l0 on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force ex3xii9 c3l90oax4gvg serted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a string oi 2uy3x*skm82mg.8gqf 2o-fv0pfd twhich has a tensifpf 82mgmtdgy2oiq 3uv02x .*8o sk-fon of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horiknaagss:c,/tgj xf6j *e-;c (zontal 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 s ;6j-g t,jkcn(sc:* faag/xe what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on ail:yuc kxm4)xi0 s+z- frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force thatzcms)lk0u -:y4ixi x+ block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass ra*r -ubdr.mwn .1r3sm; 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. Mass m acceleratesrw -3.dr*.r sambn1 ru downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3.0 kg on its eg t ; k)xo t0d0;llmg0;3gg,x m0tceujnds is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the massestc0l kj; u);lg00 e0g;mt3mx, dgxgot?

  02.36: Two masses, m1 ynr*4y(ajpw:hxl;l . p mw2o2and 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 frictionles (2r* 4mly lpo;j.yp:n2hwxaws 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 largelc +m(nh(d)k pr 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 surfaces is μ , what would be ln)h+kc p(dm( the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an inclinej jc( hknm3r j8kz+w2). The box has an initial speed of 9.0 m/s and rises vertically 2.60 before c w 3m+ cjr)kkjhzj2n(8oming 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 surface. A constant (j c;y qitq4 ,4n8hb bfc5m1n0jvujp; horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the distance pushf j1bc uq,bvn40qnm; 45tcjj 8(hp;yied 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 hastpc9 j-f,-c7jp fga+t a 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 rest and the incline makes an angle θ counterclockwise from the horizontal. Which one of the following choices best describes the orientation of the appli-9g pat+ j ftf-7pcc,jed force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.