96.30: An 800-kg elevator accelerates d 76 cgvplk al1 d zlid60rwddqrz/0.9+ownward 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 ele ew4 mufh)kunl1.6(xs vator. At the instant the elevator has a downward accelerati()khf uem6s .u41wl xnon 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 stand+ msp9qckg98js on a bathroom scale in the school’s elevator. When the scale reads 520 9j9cgkmq s8+pN, the elevator must be

  00.12: Astronauts in an ort*1mmwv4*ak e biting space shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences "wwi75f nc iw:iye 5(vp tlc1utj5*2q3w eightlessness" 2*5tcifwtjc1wy5w u q3i l 7vp(:ne5ibecause

  11.10: A string of negligible mass connects an objey1 2 l4lsn-fx c:z 5mhp,)+jmhlqf kd1ct 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 onz-5 n)pj1fh :m,skfxhm1+ l4clq l2yd 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 relationships between these forces?

  12.10: A string of neg7 o4 ylftvkq y1fd;84gligible mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a cony;t gk41 ofylvd8q74fstant 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 kg0c d4hw.cgbh ul4g1 6w mass on a horizontal frictionless surface are connected by a massless ldhcg0.4ub6cgh 41ww 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 fria ai:c6i5uq(ls1clb o kc 6*x0zh9- yictionless surface are connected by a massless string A. They are pulled oa506h 6ukyz lqis(c*ix-cc lb9ai1: 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 suk (*nj3gj nkj,rface are connected by a massless string A. They arnk,gj j njk3*(e 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 sfxvzdzr( v304 ,wupeyvpy6x z+ je6-.urface. A 36 N con0,e ve3xpdv xyry4 f+zj(p6. z zwv-6ustant 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 whichasqzwl5 kjb -7sp-z 3. has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is ne7sqbz3jz -a-.lsw kp5gligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frict-seiwui seh;i*1a *ll*6te1,qrv 9wwionless horizontal surface ar**q6ww1i ses;v et- we*li,1la 9uhi s 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 Xvi1tbyruz 9fj3:tipe)a*m +0 +.ikc q andY are in contact on a frictionless horizontal surface. A constant 35 N force is applied to the ritmb9fvrzi )+ki03.+pjy at u* qi:c1eght 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 attachtex5u.hlyq8)poujmjzg 18(p7p(tf1 ed 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 down )(lfumoppq zhj. 8eyj1t1tu87x p( g5ward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg anen n hzm9-tl67d 3.0 kg on its ends is hung over a frictionless, massless pullehnn m9z e-l76ty 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 arranged as gw4 ,djk/wwx iiw7tf+sq5f 0/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, m1, and the tension, T, in0/wf wtx d,/qf s4w5gi+kj7w i the cord were known?

  02.42: A small box of mass m ispo c)xx1b9 +ibycfxjjx8s .17blaced on top of a larger box of mass 2m as shown in the diagram at right. When a force F is appliedco9 f1bc8j x)1bbj +7.xxsyi x 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 incline. The qo; 64ff85+vnlfkvz ubox has an initial speed of ;48nqvfouvfl6z k f+59.0 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 ftu +2jcdr4 woyi:7r1+ tfqh( at rest on a horizontal surface. A constant horizontal force (: twcq+u7hf4r2 o +ityrj1fd 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 / smjrqn /.-xlforce,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 descn/jq.s-xmr l/ ribes 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.