96.30: An 800-kg elevator accelerates doc-:9(jh fguciwnward 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 t+ro: xk1g j8glhe instant the elevao :8jkxl1ggr+ tor 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 bathrqky :2ngxt ; wjgt6:1lr.g rv: 332ka)mcvwpkoom scale in the school’s elevator. When the scale reads 520 N, the elevator musar 2xy)t3rwgtgp.:6q gj2:nkckv w;v1 : m kl3t be

  00.12: Astronauts in an orbiting space shuttles p/-fx vxn*ingn7 x7/ are “weightless” because

  06.16: A scientist in the International Space Station experiences "weign +eit27nro8it1)ob+reh 2c ghtlessness" becausegrene1 ot2 t7hnc++br iio) 82

  11.10: A string of negligiblt3t6q); nkxohqi 4p 0oe 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 ; 0 pqxoq3okt4h )i6ntforce 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 neg/whlti0f+ztn8tab +2; lnl3 e ligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a consnt i3z+t+l wlnh/ba 2; e8ft0ltant downward 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 horikcv/6b jx *x.kj 2j/tczontal frictionless surface are connected by a massless*/ jb/. x6kcv t2kcxjj 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 and a 4 kg mass on a horizontal frictionless surface are cojrkw8j5 re8g+kvb85ud,l t jc*bl 0s-nnected by a massless string8 s0jkku5,wec5jlb vj 8-tr +*glb8rd 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionless surface are con v6; ggg)zfv3inected by a massless string f gv)6 3zg;gviA. 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 friwlo34h( z fb77n3 ustgf .q)uvctionless surface. A 36 N constant force is applie bhg74ff7l (outu)wzn.s3q3v d to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg ancukq cv;x+5+g u*lib k g 8w.90smhv*od 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown tb* g qm. 0v 9cwclkvk8u+sox+hu5g*i; o the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerate)ep, 1xq-ylcq8clq n:7ep8xu d to the right on 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 horizonta8qpqnquy pc lxe)1,7 8exlc:-l 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. Ag+w)cw verl.z 42dc* n constant 35 dl*.w 4 z c2ew)vgrc+nN 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 masslessmzry l 80j:6rz1xk*uy rope is attached to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless frict uy0*yx6jrk8mz:l rz1ionless 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 kg and 3.0 kg on its ends is hung over a fj,s( 97upjqho) fgf( kyfz5m1bbv,b) rictionless, massless9(,opk 5 hmjf(b v7qfbjb y,)gzu )1sf 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 ars/t4(/vv hq92x raofnrt,e:iranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 t/9x, qvfeha( or4s2i vn: tr/hanging from a light frictionless 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 on top of 38mg y ip:j 38s. dhlvhock;x/b how7 ;zo:yo-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 the same acceleration. The coefficient of friction between all surfaces is μo yc-px7h:jd;ysh; 8 lgzbokvh:w/i8 m3o 3 .o , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an inc(zqrxyp71,u6a ceru 6jm 9s6sline. 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 inclinupse 7,ra 1z69jcm6xqr6s(uy e is$30^{\circ}$, what is the coefficient of kinetic friction between the box and the incline?

  05.44: A box of mass mis initially v:53vvc9+m am dbsv v1at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, dire bv1d9 vmv+3sva5cm:v cted 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 frjdszai3l *g 2*s uad;xr0y s21ictionless 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 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 l*di3 j*sr2a ;yxdg s02z1as udirected upward, parallel to the incline’s surface as shown in the figure.