96.30: An 800-kg elevator accelerates d3iy:w5w*jp0h)c tvd k 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 elevaye9 94je,yk 7w gb9zh-syhezk :z- q-tvyc3x/ tor. At the instant the elevator has a downwar zw-y9y,:z kxz7hhvt9e3y eqg/ye9kb --s jc4d 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’s85lynuj h7l7ltvuk2) 6q9ij 6av .cfb elevator. When the scale reads 520 N, the elevator hu v7aykft65vllbnl)j8i7u 2.69qjcmust be

  00.12: Astronauts in an orbiting sl p.jow)0dweys ll24( pace shuttle are “weightless” because

  06.16: A scientist in the International Spacebm 1tqf( cs+d-(kejg, Station experiences "weightlessness" becf jg1(kqs,b-dcm +e (tause

  11.10: A string of negligible mass connects an object of m,ook1bc z 29czass 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 ,19o2 bzo zkccthe 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 ogmc 8/*j-yi6no el/hwf mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant dn/6we-ic g8/o*hmjy l ownward 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 ;1c7x fhirk1imass on a horizontal frictionless surface are connected by a massless string A. They are i;hxrf11ki 7 cpulled 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 frictionless w* zuy6e1j2mv surface are connected by a massless string A. They are pulled horizontally across the surf u* 1wzjmy2e6vace 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 surface i2k/gz ;1vv1bcg7j bsare connected b i1v7cb/zbvg ;k2 g1sjy 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 contact on a horizontal frfz( vvh0cp7l5ictionless surface. A 36 N constant force is applied to X as shown to 5h0pv(z 7lfvc the right. The force exerted by X onY is:

  97.31: Two blocks of mass 6t1f3psqdm2r l19zmf 1.0 kg and 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 fricti 9sl2 fd1361pq mfrztmon is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the ri wp -x(-jyahk3esfq +20 v1hmlght on a 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 boj2s-kv ye3+ahq(mwl0-1 fpx hx, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless horizontal surface.op-y4xu nf ph(*ck/2 a A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X epfxua4oc nyp2/h( *-kxerts onto blockY?

  94.25: One end of a masslessfv8u(lr l3 1n* j1fwcfp9:xo h 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 frictnl: j(f ulw11hvo9f 38pxrfc*ionless 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 ze+ :yg8ci+xihukg ;*masses of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnituii g +z*:cgke+yux;8h de of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected xppv, 1/:z)e2y1oy2r vs ptzlby a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a li/rvpp vp1l2:yz1e zxs)o y 2t,ght 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 known?

  02.42: A small box of mass m isplaced on top of a larger box of mass 2m as shownyi* i50jj/ hw8zo ;i8vux glf: 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;0/ljg iiyfx88vojiu*:5zhw ient 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 an inclin3 owc a2bp/.xee. The box has an initial speed of 9.0 m/s and rises vertically 2x3oc a2wp .be/.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 surf*9 vg: w. v.mxlgz4zywace. A constant horizontal force of mg/2 is applied tgw9*4 lmx:vz.z vgwy.o 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 force,a amm0/r1.kw ujft2nr 5 jwv((q normal force from the incline, and a force applied by a pnm f/w vj.r5qw0trmja(u( k12erson 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.