96.30: An 800-kg elevator acceleraawzvf;k060d :yxq0i* ajk g0btes 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 eluyouy oder0( 589db/ym9(mwaevator. At the instant the elevator has a downward ac9y5o a /u8 eyymu w(dr0bdm(9oceleration 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 ixp7q(n7 cgix ywa44w3n the school’s elevator. When the scale reads 520 N, th( xg44a iw qycpxnw377e elevator must be

  00.12: Astronauts in an orbitic)shkv/ye6fs uc/7q wy6h6 j 1ng space shuttle are “weightless” because

  06.16: A scientist in the International Space Station et h3v0a(-q c pk75qz-*)amgr) osmnhsxperiences "weightlessness" bv qhkrszgq 0-) am 3-)p onsmc7t(a5h*ecause

  11.10: A string of negligible mass connects an object of mass M=10 kg to the c mwtztfxd;w*g ;,ek yk1wy):*eiling 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 one of the following choices describes the relationships bw; d1 ywf*x e t:gkk,mt;yw)*zetween these forces?

  12.10: A string of negligible mass connects an object of mass M=10 kg c ba*).vl kak9to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magnit)9bvcka. a *lkude $6.0\; m/s^{2}$ . 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 nrka9 ,q+,o i*x w:egahorizontal frictionless surface are connected by a massless string A+kx,r w:,*a g9 qoanie. 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a.k,wu;/ywq go horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a co;wy.k q o/u,wgnstant 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 fric0v47lkixi2 /zrp+ l ,m t1mciiopr:0f tionless surface are connected by a massless string A. They are pulled horizontally across the surface by a secop1ritx7z4/om2,+ r:fi 0v mkclpil i0nd 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 arzx k:t yc*l3n.) 9 i/dig9wcthe in contact on a horizontal frictionless surface. A 36 N constcc: i9*9ny 3gtlkwzhd).x /itant 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.)*y7db q:fgs+6rra yw0 kg are connected by a string which has a tension of 2.0 N. :7+ f)6 aqr byrsy*wdgA force F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerar1i yfb8o4l o1u xigg4xx.3s ,ted to the right on a frictionless horizontal surface as shown. The larger box haiu xgl 43b1,fo1igxor. y4s8 xs 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 surface. 2-q0h+jjcuz k4oy6w gz+ jfd4A constq4kjh6zjjfg2 4wcz 0ydu++ o-ant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massvg3l /jae-t//kqm how v r2cb*c*02m eless rope is attached to a mass m; the other end is attached to a mass of 1.0vjcaw/q- e/ml 2oc2*0r /*3et khmv bg0 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 masses of 1.5 ki6-s1, a 0z(b:b/u hnqh9ca zed7mseng and 3.0 kg on its ends is hung over a fri 7:czhnaz/bd 0 6bue(-nhs,as e1m9iqctionless, massless pulley 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 iyf 2 ksc- ;(vxwe o*1j;lyx4cas shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictio;(ey w4jfkyx; *cxc2svl-i1 onless 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 q;6zl+ qf)twjon 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 accelerat zq+ 6t)j;fqwle 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 has an in oo7 r 0iae4t02q-ue 7( /tjeh ngmlv2ek3kkf+itial speed of 9.0 m/s and rises vertically 2.60 before coming to resn2a4jge/l+0r(oh k mtkufqei t 02eo3e7kv -7t. 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 res: ,-r67ynanqbm6xi p .ufy5/u- yqigp t on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the i py6qmn-x:ua,f6brn7i .-p qg/5uyy 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 inctc.c s.5 :rio8ri nji/line has a gravitational 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 orientation of the applied force by the person? The +x-axis is directed upward, parallel to thi ijt 5sc:. r/8r.ncoie incline’s surface as shown in the figure.