96.30: An 800-kg elevator acce jg7e-h aub9+zlerates 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 the0 pxl kg4sdxm767i/lj elevator has a downward accelerkim 7jg/lxp640sxld7 ation of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing dvzq2jn2)g zmb80z,jwkrq 4 (500 N stands on a bathroom scale in the school’s elevator. When the scale reads 520 N, the elevator mr( zmn gzvd)qjb0k2q4z8j, w2ust be

  00.12: Astronauts in hcuhlf 3,9efzdqi0wbb6 1 m72an orbiting space shuttle are “weightless” because

  06.16: A scientist in the International Space Station9cm/6xxu9sblaoa 6))t,8 ey by,m l xi experiences "weightlessness" becauste o9bx9u,il ) yml/aa,b cy )m8sxx66e

  11.10: A string of negligible mass connects an objeceiwf3uj7eow4rai* 38nam (pr +v d85ct 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 following choices describes the relat7 a *r3 enu3moiwc ir+vwfd58ap8e (j4ionships between these forces?

  12.10: A string of negligible mass connects an object of m:8 sct;u:v mj 6b-fuq ,p)mixbass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward :m;bp:,q)i8 jmfscu - bx6 uvtacceleration of 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 )fohqoa7)y c 09guy+p rr6kd54 kg mass on a horizontal frictionless surface are connected by a mu dc)hgq6o9 5yp7+0rr ko yf)aassless 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 force of string B on the 2 kg mass?

  03.07: A 2 kg mass anrs)pg5 +6*yaab o wepj g42unp d791nsd a 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 wijpg7y+5rsd41upeb9)a6snn2a * w gop th 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 frictivcu 60c(za no9onless surface are connected by a massless string A. They are pulled horizontally across the surface by a second strin06uc9a (cov nzg 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 horizont )fa;hdff a54fal frictionless surface. A 36 N constant force is applied to X as shown to the right. The fof;4 ffa )5dahfrce exerted by X onY is:

  97.31: Two blocks of vnw ,hrs679kcg- s- (pmdqk*hmass 1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F ah-( mh,c*sgqp dk96krv7swn- cts 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 a frictdu.oh2tbt; vtnho22* ovwh 84 ionless horizontal surface as shown. The larger box has a mass of 9 kilogro2hh nv42o;t2 bhtv wdto.*8uams 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 i 9 (e*c7yre6vs2hxdwa frictionless horizontal surface. A constant 35 N force is applied to the right onto bli29* x6ecd 7svre(yw hock Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is yp 5+;jvi0u to :(/tuzp9svtn t+l6sd attached 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. Massjp6tuv+t yl (/s9+nvop0 tdut isz5:; m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3.0 kg on its ends is hung oz67w8zgm8xx jnuv5 djdknx 12,q2 b;pver a frictionless, mazj 5x82wdb6 2nz;u jxxpq1 nmdg,k8v7ssless 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 arrange6 msm jg0uwlbcmc79( 5d as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What would be tuw0mc9 cbl6 gs7( mm5jhe 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 axpc8w k c/n6(y ubp*2box 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 the same acceleration. The coefficipa(xwu/6 yn8cbk c2p *ent 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 emh vy( clj(/7u t6q;kan initial speed of 9.0 m/s and rises verticaemlv j ckh;/tu7q((y 6lly 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 mism)g ev+simfb0,96f 3x fzu8ds initially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to segifu0m ) 6zf+,8bxmv93s fdthe 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 frictiond 8j,d bh-, ynfjb:gl)less incline 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 anb8,h,jy dl-n bd) jgf:d 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.