96.30: An 800-kg elevator accelerates ohf1-ue 3pwjx1b;df++ wm b6bdownward 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.w*-zznv 9ryp- At the instant the elevator hv -9y* -wzzrpnas 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 stan aufwirh(ia)f;7 ,h7p x**talds on a bathroom scale in the school’s elevator. W*h(l*paiwi,7a ;rat h7u f)xfhen the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “wej+/ar( ndxyiq 16dtbp 8 0osk,ightless” because

  06.16: A scientist in the Interz9gg0icm 165t/ f dpr w6qvc1pnational Space Station experiences "weightlessness" beca9c g dr5z6fticpw1 qm16/pgv0use

  11.10: A string of negligible mass connects an object of mass M=10 kh.6qyjcxchz sg3b .,7g 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 (te. z6jhs7yq3bch g. ,cxnsion), 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 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 to the1 6 ugsoqp8/6bsd cb-akfch ;: ceiling of an elevator. The elevator experiences a constant downward acceleration of magni-pd a huqkb/1ccsb f s:;68go6tude $6.0\; m/s^{2}$ . 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 md*7c-a hgz 1nwass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a secon-7w zc *ndg1had 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 fr 5k,)fzdyst:uom19r fw2 ;lguictionless surface are connected by a massless string A. They are pulled horizontally across the s,sygd)ffw; u1 m2:5kt9zulo rurface 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 surf: :mh1uf eimv vrm3a4po/vm37ace are connected by a massless string A. They are pulled horizontally across the surface by a secondvri 1ova3pev 4m3uhm / :mf:m7 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 Xmoyedt8tk**08 uefw;: y1 fvl andY are in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to th ;o8m1ytfle efy *uw0k8vtd*:e right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are co il axscs:)gc699sn7a nnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction isa)x9 lcn6ags:c9s 7 is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizont4fc7 yryo0 oa7al surface as shown. The larger box has a mass of 9 kilacory 0f4 o7y7ograms 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 kt7a5h.y fy(s contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onyt fy(.has7k 5to block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to aw il-6blm5 0py mass m; 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 accelerates downward atbli6w- 50 mypl $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kguhswh k:ov2)7 f9u 7uoo j9(ky and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of tho k7wfv k:j9o)su(h 7 29uyohue masses?

  02.36: Two masses, m1 and m2, are connected siu-nw(vv o )xg t-38pby 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 t-vsv-n t)8uwo3( pxgi he cord were known?

  02.42: A small box of mass m isplaced on top of a larger box of mass 2m as shu,1pj(; uvgu kown in the diagram at right. When a force F is applied to the large box, both boxes accelerate to the right with the sak;(g1 vu,ujupme 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 accelerationj, x )gqmu)sok5s;zr6 up 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 inclis6 rzuq)o5 ;,sxg) kjmne 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 hori;dl3o net6 3 nl9+kpttzontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the distancdet6ln3nl ktpt 9o;+3e 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 force,a ,mgvy (j8dwc ;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. Whdv8 y,g(cm;jwich 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.