96.30: An 800-kg elevator accelerates ki:x2q.vi d9v downward 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. At the instant the ele1k j ,4u(.wc( qma-t k ezc328hwubqftvator has a downwa ,kjqu.t13a2weu4k(-mz( f8tqwcc hb rd 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’s eleva73lmconsza uwg:a8/ 2 g.kg3zrw8g 4 stor. When the scale rwlg.sr/ wg28 3so4ac7zmg a:8u3zgkneads 520 N, the elevator must be

  00.12: Astronauts in an orbit6o zbskwfx9l 3b: k;6k)+c8kia3lad ning space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences " tyx +r+loh;mwwo 792kweightlessness" bew+mo7 +o9yrkh xw 2t;lcause

  11.10: A string of negligible mass:kgp g0su+ du/ connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward usg0u+d :kgp/ 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 one of the following choices describes the relationships between these forces?

  12.10: A string of negligible szr 4c9u oi7pvm6-r*d mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnprcozs*4v 9r6umd-7 iitude $6.0\; m/s^{2}$ . 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 ioqg:b7s42ux8 ;c n kza horizontal frictionless surface are connected by a massless string A. They are pulled horizontally acro82b7ixkzocs;u:g 4qnss 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 m:u3nvqq(v yw ) e9d3csass on a horizontal frictionless surface are connected by a massless string A. Tv(393) q e:w quvsdynchey 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 force of string A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frict2x.khte p-*toionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleratioo*thp.k- 2t xen of $12\; m/s^{2}$ .
What is the magnitude of the net force on the 2 kg mass?

  96.33 : Two blocks X andY fw o;wjl.5dds7gj/3g,o h za:are in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X onY o w3j/g7jo;g5fl ,a wzhs.dd:is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are yw 5-i(pww-iznqi o/m/tr+)a connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Asw(aiz i)pq-+5/im/yw -twn orsuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to t6h.9 emrbw wd)i+cz -yhe right on a frictionless horizontal surface as shown. The lar w -6r.ey9cizhd mw)+bger 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 smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless horizontal cmi ( d+kszi7e2j n3:vsurface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockY? i+73c ejnkdi(v: zs m2

  94.25: One end of a massless rope is attacff,nm ;hd: m 5.xrhsq0hed 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. Mass m accelersrmh,0qx; fn5fm.d h :ates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 ks5su9sne ;h0mg 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 thsmsse u5h;0 9ne acceleration of the masses?

  02.36: Two masses, m1 and (cxb;1xl-rtkbe 6i ;pm2, 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 frictionless pulley. What would be the mass of the falling mass, m2, if both the slidb; retilb xpc(-k 6x1;ing mass, m1, and the tension, T, in the cord were known?

  02.42: A small box of25kdm *8 zlqjw mass m isplaced on top 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 aczml82qdk*5j wcelerate 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 acc 2n53rpf3y+:0dvtzqxc+wh t x eleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If th+f5w:qt +zd xpcr 2xyv03th3ne 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 horii s b6bpu)ccp7*3btdpo:9 y. czontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changd*6itbb:c 3b cp7s p9p)u.yoces 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 normal 7r8e ki)u2ls(mh u7rwlf 11prforce from the incline, and a force applied by a person that all are equal in magnitude. The mass remains at 7l)pwk reu(1 usifhr18rm7l2 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.