96.30: An 800-kg elevator accelerates downw4d almcbpk/g-qsy* s--m 4urv7 +5axj ard 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 scal/)br a dkrwegt+l)hxkki,i:.4w yg 01(l7 pzr e in an elevator. At the instant the elevator has a downward acceleration lg yw+1ih)x b tz/:k07pi4k .k, lar)( rrgewdof $1.0\; m/s^{2}$ 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 thgdvni8. w 9uh/e school’s elevator. When the scale reads 520 N,/g8diw n .u9vh the elevator must be

  00.12: Astronauts in an orbitingqxv4b a:g:z h(v ;ivs5+ g1wyi space shuttle are “weightless” because

  06.16: A scientist in the Internatioz98 tg k g68 sjeri9/baooxy-drk):5qnal Space Station experiences "weightlessnessi8sg 9dk x6b)zjr/oo ta89qy5e kg-r:" because

  11.10: A string of negligible mass connects an object of mass M=10 kg to tvcrx9 *sit;. w)2uxshhe ceiling of an elevator. The elevator experiences a constant downward s )tvx9;scwrx2i h.*s upeed 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 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 -yf sw*xt7db7/ 7kiym+ka m0ikg to the ceiling of an elevator. The elevator experiences a constakmabsm7i- y7dy/txw *0ik+ 7 fnt 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 fri7)pwl j-( -lf8r:sc n0ocx.:io zpp rkctionless surface are connected by a massless string A. They are pulled horizl): ppk .:oi-7f xz(nc0coj8rswpl-r ontally 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 +p ak+bzwi((r8pbo7qsurface are connected by a massless string A. They are pulled horizontally across thkqpa(o78b rz(i +b+wp e 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 a/5tu4uw8udqvdp;r-f i+ fh a/nd a 4 kg mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with ua /u tufqw i d84v-/hr;fdp5+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 faq.)r58ix/ s*)w bsmn)+rugei mqb6 arictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X ogxs6eii q b5ama)* b)mr8ru/)w.qs+ nnY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a strify xv );na*nj5 1dc3hsx3 6imkng which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, h 6c)ni x1s*v xa5;mfjny3d k3what is the value
ofF?

  99.12: Two boxes are accelera5bk4y.fn+b:7 q 5+iosyhl i ;9wsdhfx ted to the right 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 box, with what force does the larger box pull on the smi+4 ;khy5o.5wyfs+ fbxq 9lsh :id 7bnaller box?

  17.15 : Two blocks X andY are in contact on a 5e/+ms qi/9ymp/d tpa frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the a/mti/sq /+d m9yepp5magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope i.k +q 39at/sngp7 blo(zm5 tkts 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 shown in th /tbz7 slmqt9o.+t a3kk(5n gpe 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 andpp,4dlnleo *wai-6o.3u- l ts 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the rig-s3 itd* e.noa-4lp o6lpw,ul ht. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cp.iu: l63 zdluord 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, m1l 6ul 3du:.ipz, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced on toq(g di37ss/rlp of a larger 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 ais /7qrgl (sd3cceleration. The coefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uni1*clp n6hs a,uform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before s hp,6nca1lu* 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 surface. A constant y79) g)pnd6xcqg7b ljhorizontal force of mg/2 is appll9q)cyngj)gdx77 bp6 ied 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 force,a no 0:7bo5 wy woj6b;1a+ u gwiufks6t/3xkgmuq2 rmal force from the incline, and a force applied by a person that all are equal in magnitude. The mass remains at uu:;3x2ms bqw571b6oi+wkg wag o tuyjkf0/6 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.