96.30: An 800-kg elevator accelerates downward z0:0 s0nnkflac 0k7ix ff z:/1fan5aeat$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student standu4f g;-rqqf*e s on a scale in an elevator. At the instant the elevator h f;f-eq4u* rqgas 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,h o o9-tayfu1 bathroom scale in the school’s elevator.fh 1,ay-ouo9t When the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” becaukesbvuk i75a-/j z788fcpda * se

  06.16: A scientist in the Internatnq+us cczfas+/agrl09 e6 1e;ional Space Station experiences "weightlessness" becaf1s z;0cg+ /calueq6r+ 9en asuse

  11.10: A string of negligibldfe /zte1xqd6uxbst.r ; 1a:vfs/j),e 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 ma/ u1esr1/zbf,f.avet)jqsdx 6 t :d;xgnitude 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 conj8x2ibhq . ny4qvg(y:5uh+d unects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constan hi5 qyhu+ 2gdy4 8vb(xunj:q.t 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 frictionsd4ohsgr.,d3o d t.)q less surface are connected by a massless).td g.d,q r3do4hos s 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 an 3.fvb ho,);38dqpuu9vtntk bd 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 with a constavup k;b3dob)u 39hf ,t8t qvn.nt 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 frmxcls1cd,9agk hp47 8 ictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B widk,p7x1m4csl 9h8 cagth 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 ar3zllw ekj9-+ehv*j d 5e in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right.l *5 3dhe9-w vljejk+z The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 .ffzm8 92x e6+fpkhhykg and 3.0 kg are connected by a string which has a tension of 2.0 N. A force F acts in t6 e+8h2z 9xphf .fmkfyhe direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are 2i,yo()uz-muoz : upjaccelerated 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 horizontal force pulls on thiz ozm(u), o2-ujuyp:e 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 ,ycz i 9cty3 s1,mpp4ghorizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magmct y iy,4cpsp91,3 zgnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a p5q*/cik1njou* ti )*zx fh+t 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 downwar ) *1*f5oc xqi/t tzunkji*p+hd at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3.0 97aut h6eqvz+*ny/hy;m a h r/kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the maht ;y6uznmvhr9ahq/e*7/ ya + sses?

  02.36: Two masses, m1 and m2, are connece*,kx dy1h) cwc5ttf7 uq 9f0eted by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a liqe,hdxt9t705kcw*1euyc )f fght 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 isplacepsvne54edd7,as j .r4: p k2sod on top of a larger box of mass 2m as shown in the diagram at right. When a force F is54 4. dro,p7vee js pkn:ad2ss 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 incline. Tmu1bm)1b*bpjqy68 t bo xo19xhe box has an initial speed of 9.0 m/s and j 8box9 )om btxqm*1y1p6bb1u 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 surface. A co7g45 xgli+z:u 8)p euu+: ir/,zbkfgdlt .luvnstant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the distance buk,l )gi ++gzv.x /uriz t8edup45: :fll g7upushed 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 gravitationa2mynyk 2ly+3a4k5a o ll 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 tyla5a+yn22o ykl mk43 he person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.