96.30: An 800-kg elev3c ab5 7l qnss.14iz wypw*+pxator accelerates 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 8 (kqp2q dceg uej*76ithe instant the elevator 2*qg 7p u(kcj6qed8ie has 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 stands on a bathroom scale in the scav wwp-,ds6 yy3+qt *dhool’s elevator. Wwvs6*qdt p3da +yy -,when the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” becausev53*;j3ulkmpx p8m(od w3wwe

  06.16: A scientist in the International Space Station experiencesq geyhd0l9r82iw ux(g/c .m4r mq uhikk1./s7 "weightlessness" w .su kei.8ig1/q dhy4u(gk9ml7xmc0rh 2/q rbecause

  11.10: A string of negligible mass connects an object of mass M *s;rl97ie tbh=10 kg to the ceiling of an elevator. Tst i*her97bl;he 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 one of the following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an object of(.qq)-h7nivif6ll*zk6 nw+ cfg vk 9(si2z pf mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration oq vn6c l sl. f2)iiniz6qf h(w+gzkp(9k7-vf*f 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 m/jnx2/wr tu-xp na8z )ass on a horizontal frictionless surface are connected by a massless string A. They arx2wt/un8zn - rax/) pje 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 B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal frictionless surface 3 jq42bqqhfy428kqcn vo +1d+ cpdfz1are connected by a massless string A. They are pulled horizontally acrosq84f j21 1vpyqd+k3cd+nzf 24hcqo qbs 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 av/dau rtd9 bn+9; 1gch2g/ba2 7ksl5fozm.ia 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 a constant accelera+gvomr9 cu79k2a5gdahsi n/fb;d/1 tbl 2z.a tion 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 4:/ 1jrfn:tbzf0 amzgqr+gpx6(h( ag horizontal frictionless surface. A 36 N constant f (rxr (:nz+fg:qh4afjmg6tb0pa/g 1 zorce 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 str 2zc8axq,sfc,ing which has a tension of 2.0 N. A force F acfz,,cs82 ax qcts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on x hsz:lebpvhnw2-* d;:g l+o- 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 small:h hx npdbs+:g-l*;w ovl-ze2er box?

  17.15 : Two blocks X andY are in contact o b)0 gfx0xe0g(axc;u; gi lms0n a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. Whfumas;e gc( i0g;0x0 x0blx)gat is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attachedj1;wekyu*+ r.gwcywch j/x 7, to a mass m; the other end is attached to a mass of 1.y+*.e w/jy x1rwjg,;w uh cc7k00 kg. The rope is hung over a massless frictionless 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 masz7tsvl o6d*g)0k:b hq6hnl0d ses of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless puln dvhtks6d )0bz67q ol0 l:g*hley as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged xk he 1y7x78 hbr d3)ss*veao8as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What woulkeabxxsyh7 8so)evh rd87 13*d 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 oquje ud/c8o6: f mass 2m as shown in the diagram at right. When a force F is applied to the ju/ :ce6quo8dlarge 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 uni.mcq.bb 3q,w 5ql g,xfform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to res3gl5bmqf,x. cw ,q .qbt. 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 horiz3ixju- a ;wb 5fm33qwfontal surface. A constant horizontaljixu;f bm 33afww35 -q 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 gravitationbx0s-ix q:7ovz,q (s xal force,a 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. Which one of the following choices best describes the vqxx7 s0xos-z,(qi:b 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.