96.30: An 800-kg elevator accelerates downward a q-2vp 2oirpy-n*zj2 gt$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student st+1g au5. he5uinpw 0urands on a scale in an elevator. At the instant the elevator has a downward acceleration u r u5+hpn.1gw05aeuiof $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N stands on a bathroom slr qj;-f ka((icale in the school’s elevator. When the s kl((;ijfar-q cale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting spacek+mpziuwzc, r74f07 e shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiencl,fq5(6m09q c um :mbzmc9 somes "weightlessness"uz :fmo5qcm cb 6m9m,l0(s 9mq because

  11.10: A string of negligible r0j55zh /md c jmc)gz2v,zua-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 inz u5/mv a2zjm-r0c jdhg5 ,cz) 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 kgxy ck(op8i . i63c5brd to the ceiling of an elevator. The elevator exper5.ipc8di6r o3x ( kcybiences a constant 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 horizontal frictionless peej);hqfg be( gtfe9lp :4/4surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration of eb efe/ :fph) tp( l;4eq9g4gj$12\; m/s^{2}$ .
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 areh6m 6ycr79vkyw e zvye+*gh6+ connected by a massless e6my6 9*+ehzwgy+ky v 67crhvstring 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 conctat(f7trs tq7, )sa .nected by a massless string A. They are pulled horizontally across the sur, a77r(sc f.st a)tttqface 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 fri;s06/tytr v pkctionless surface. A 36 N constant force is applied to X as show;rv6 0tpsk/t yn to the right. The force exerted by X onY is:

  97.31: Two blocks of masszyfh;:8v xnv2ty: qn. 1.0 kg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the h 8 yq vzy::nt;vf2n.xright. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right ko fd7lsn(5d*on a frictionless horizontal surfaces57kflod n*( d 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 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 fricti; mo-w ss9icrshgr)73qlu2 w/onless horizontal surface. A constant 35 N fo-w2lom)s/ 7 q c3;r uihws9rgsrce 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 massltv,ho rdmvdz 92u q)(za4p96;d -e ptqess 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 frictionless pulley apd4 qzv;p d vhadr tem2z(6,out9)q9-s 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 3uqqq+y+vvl( -pgr+lh 8 mxa 9a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of t(v+ qal+hxm8 vy9gqlu+- r3 pqhe masses?

  02.36: Two masses, m1 and m2, arid+ . uzzy ohcv0g;c6moq p(**e connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging fr hz6(v gq;*+yicumz.dp0 o*o com 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 ofb. 4 *b7gugsbl0t0b ko 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 a4bb *0tkgbgo.7sl b0ucceleration. 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 inclingo 8bbo5+)gnqi oo 32cjskg ,1e. The box has an initgonb2oo + s3)5coi, 81bg gjkqial speed of 9.0 m/s and rises vertically 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 mis initially at rest on a horizontal surfacell)4jy)rr . hdy 5debk3.qu -h. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the.uy)l j.-hkr 3r qldb4)yh 5ed 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 mv/g-1wa*qi-u)fy rrae f 6u+gravitational force,a normal force from the incline, and a force applied by a person that all are equal in magni6 yawf-*ire/vfqr uu1)g -ma +tude. 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 the incline’s surface as shown in the figure.