96.30: An 800-kg elevator accelerates downwar xbs: a2puxgu9gc+ h8tb2,e)yd 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 elevatot l7a:x.p0mg -pxrm tsxl)9l *r. At the instant the elevator has a a lg ml:xp-s0mpx*.x r9)7lttdownward acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighirla6hi n+uy/jceh*7uhywt2:g e s1* 2wj5 i, jng 500 N stands on a bathroom scale in the school’s elevator. When the scale reag 61r: wj,j2u* s2 yj/c+* h7wh5tei nyualiheds 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightl5 ofvf /-nxjn*ess” because

  06.16: A scientist in the International Spacedf5* f.n,p vzy b8n8ra Station experiences "weightlessnesrffz 8,8abnvn. y5d *ps" because

  11.10: A string of negligible mass cx4 82oaql9 tuy/q(s sjonnects an object of mass 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 the elevator, and F represent the magnitude of the net force acting on the mass M. Which 9u l(q/yx 2ss qj8o4atone of the following choices describes the relationships between these forces?

  12.10: A string of neq3 ap9 ud6c.u9dp0xjlgligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration oja9.q0 3 9dx6pu upcdlf 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 surface fl* ps33.aqq5ocw 9qphttcv gu 26u rh)mt*(4are connected by a massless string A. They are pulled r cghm3w sqqu*vp (qu)9*t2t36lt 5 4a.ofpchhorizontally 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 hori0w56 o zobg638vumppawtx j6t4v d-,bzontal frictionless surface are connected by a massless string A. They are pulled horizontally acr 68g64z 5 ,op twa-3omb0dvtbjpx6uvwoss 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,svh dbwlrbc+ 57 x9suin/,j. surface are connected by a massless string A. They are pulnjbw.x+h/dsi5ub 9l7rv,s c, led 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 frictionless5e4s3m /adrtmrew8e) surface. A 36 N constantr ws/etead34) mem8r5 force is applied 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 string w6awd0w1ew:aay 6 m6ku8x .owuhich has a tension of 2.0 N.60oww:k.1udaw e8awx y6 a6u m 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 b rcn mt320r3anzij7d ba7xz)b:41czaccelerated 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 thda mnx 1ib74rznc: )cb2ta3z0r37j bze larger box, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contaca lkh qbk6q-g(ar fm1hd(q,my;76 ql5t 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 thmh5-qmqbf;,d(17akg al rk lq66hyq(at block X exerts onto blockY?

  94.25: One end of a massless rope is attacshz:m qd0fb0u;ez6;:9 lr-yvfp ly3 khed 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 the accompanying figure. :lpl0d z6;y bmk fufyhr0zq9:;3v e-sMass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kwjn2p6 g 87bwwlz 7zc4eig))m g and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the apprgjmiwcz w86 e2g47nwlpz)7)boximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as so24g+yzn q ) 4h3y ayf-4vtglqhown 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 maslhfyqv gaq +2n )4 4otzg34yy-s, 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-y jm e9sbcgr,sdg 8.: shown in t:jd8gy ,sgr b9-.sc mehe 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 the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box q9molr6;:1ns- o, 5dru8curu zm/zjvhas an initial speed of 9.0 m/s and rises vert u vumzmrqnzr1c8-9; lr6su,o/ o d:j5ically 2.60 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 in2xpz 5nrk/w+ e*n yys4itially at rest on a horizontal surface. A constant horizontnz xnsy+4r5w ep2/y *kal force of mg/2 is applied 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 for+ zq/1 t r:zuklg+x8vrce,a normal force from the incline, and a force applied by a person that all are equal in magnitude. The mass remain+zl/ vg+zxq t:kr8u1r s 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.