96.30: An 800-kg elevator accelerates downwarpg.:-gksm6.itbbe )fd 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 elevr(ebl.7 cwb2 vator. At the instant the elevator has a downward acceleratil7b( erbc.2v won 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 scjh(f;pt +roy3kk- (p wale in the school’s elevator. When the scale reads 520 N, the elevator must pk hp3-tj( +k;ry(fow be

  00.12: Astronauts in an orbiting space shuttle are rupcw .dxct-3ff6u:n wk5 *-u“weightless” because

  06.16: A scientist in the International Space Station expe7f n8,k lp0 hz09sfesfriences "weightlessneses 7,0h9fz s flfp0nk8s" because

  11.10: A string of negligible mass connects an object of mass M=10 kg to theb.ly t t;*/tmsc 3c2td 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 reprl b s*2dmt /tyt.3ct;cesent 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 mass M=10 kg to tbnnm/h338 sb imm hu88he ceiling of an elevator. The elevator experiences a constant sm /3nu 83m8bimhnb h8downward acceleration 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 4 kg mass on a horizontal frictionless surface aretsr*pqpc n 0w:h :.s4 6oi1sd- p3sn.n:qyrrv connected by a massless string A. They are pulled horizontally across the surface by a sec::3st0.sr riws.vqs*:d n c py1orn4pqhp-6 n ond 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 sur,ww1 n4qzaie -7tt;wtnj*a sr.cv;5 uer /n 3mface are connected by a massless string A. They are pulled home swwr4i tnz;-c e*traq;3au/, 5vw.nj1nt7rizontally 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 horizont6 f49/)tgrqqswxd r m9al frictionless surface are connected by a masslessrf dtg49) mrq69qw/xs 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 s30eni0;q76g qx i)r ,nzezv zl c1jnf *ffi/:nurface. Annir e,xnqc z1z)lvf/: fgzie00iqj6n 7f;3* 36 N 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 kdqp2 hxfulwuw:;*x-(dqre :4g are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligi*4-xd;rhp e(lq: 2 quwuw:xd fble, what is the value
ofF?

  99.12: Two boxes are accelerated to the r*9wjr+t ,oi qcight on a frictionless horizontal surface as shown. The larger boor*+i tcqw9j ,x 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 (f,6 ef4+dn yuzifduvk,udu),ju58q in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of8, d,5u( 6dk ,f uvn 4yze+idfujq)uuf the force that block X exerts onto blockY?

  94.25: One end of a massless rope isk* mg7b( ntptndo9n7. 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. Mass m accelerates gd m(t7kpon 7nb9*.ntdownward 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 over a fs 16ec2jj r*.b3x+ tq :wdfunlrictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the m e1.xj*b:n stdjqr2fcw l+63 uasses?

  02.36: Two masses, m1 and m2, are connected by a cord an3-8 w c - 3etl.qb0pmpjkvsgs+d 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 masspv.m wsc 3-0l3 jtbegqks-+ p8 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 isplacod(s s;c4g/a jed on top of a larger box of mass 2m as shown in the diaga/g(4sd ;ojscram at right. When a force F is applied to the large 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 uniform acceleration up an f)o znfokh u6el-5e+n2r/l +jh2-k gnincline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the incline u6 +oe-zjeh f/noh+kln 2r2g)-nlfk5is$30^{\circ}$, what is the coefficient of kinetic friction between the box and the incline?

  05.44: A box of mass mis initiallyeq)pu:ybhsvg ka 2ti+uc(208k6s a ( x at rest on a horizontal surface. A constant horit28:icak phk0eq ( sb 6y+(uas)xv2guzontal 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 gravitational force,a normal03rlq rsl 2eo*: +ymfw 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.*f3e ro :lq02mrws+yl 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.