96.30: An 800-kg elevator accelerat;3n1ar71 pozora)j92vp fa knes downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student io4 k7zp ua) 7/d3qrclyjt +q,py;i)t stands on a scale in an elevator. At the instant the elevator has y+jrt i kl;)qiyp734)du,co q/ tpa7za 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 baa*yq jx2-+ ;psl 4 o;yczhsna*throom scale in the school’s elevator. When the scale reads 4j-c2 y*qsspzh+x;aayon ;l *520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttuvgkvb68xt4r p vs6* m1fi+ b;le are “weightless” because

  06.16: A scientist in the International Space Station experiencez3o w-3qsbho )l8qfv-s "weightlessness8sql)ozq-3-w3vh bfo " because

  11.10: A string of neglu3b7hjv c4 k.*5oi2fsxiol1cuoa n4.igible mass connects 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 one of the follow4i*5 uo4ob3.sujon1 kh al27 cvc.ixf ing choices describes the relationships between these forces?

  12.10: A string of negligible mass connef6 eu dc2:4a(oc,emmccts an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration of magd me c ue:(6a4cf,moc2nitude $6.0\; m/s^{2}$ . 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 avbu.snaxjnt-:/7pc fi 3 q4j7 horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the j s3in7jb7uf-cpax.qtv4/n :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 hor 2;jja fq cqp(eg 3yij-+gtl5(izontal frictionless surface are connected by a massless string A. They are pulled hori+aq-fe5yp3j g; itl g(2cjj q(zontally 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 frictionless surfa )6a i3ndmek;(wg1 iyqy* ewe1jvz*2b ce are conn 3a;ew11 (q*be*k6jiyne im v)2gdw zyected by a massless string A. 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contact on a horizontal frictionless sur ev4 bz hiy9.2/nwa+hahi+z* lface. A 36 N4/v+ezb*y hiaihhz w.2nl a+9 constant 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 whi 5tocpez18aw)ch has a tension of 2.0 N. A force F acts in the direction )wt85ocap 1 zeshown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless ho uyi 2ebu2l3p +f9fxo:rizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 y:ueoflpu b9i2 23fx+ 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 surfl 633yqwdyi( bho4*c) kcjc 5vace. A constant 365*i) b dhv3ccok4cjyqylw( 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 massless rope is attacc+vae rzf:-j f+0 ur+zhed to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionlez+evurrfjz f :+a0 +-css 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 k6 ik pvl v7-(*iwmp..kgq9 bztg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximavwz b(p.*vk m. lk6 gi-9i7pqtte magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, arf5f kb)ss :fp9yjt 60ve 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 sliding mass, mjf0f psvf6k bs:)t 95y1, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced on top of-c 7juk(j ae)(bftc8 *njc 9fv 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 t7*(jj9)t anffjv8cek u (c- bche 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 unif -yb4a cachc23orm acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of thchc4b 2ya3 c-ae 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 resibatrcq7a+p9uo)00 k t on a horizontal surface. A constant horizontal force of mg/2 is applied70+a q ui)rapkct bo90 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 nor j*fa7dibhi 9a3;ik spe10uy6mal force from the incline, and a force applied by a person that all are equal in magnitude. The mass remains at rea ku6p 7i;aed31y 09s*hbiji fst 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.