96.30: An 800-kg elevator accelerates downwrq)hp3hy4* thjhf 1u:ard 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 el8d:plerwl82)z 0v yhyevator. At the instant the elevator has a do8yl:r 2ve)h z8wypd l0wnward 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 bathr-gyfz q+ycxc- )*ntjw,1w dy8 oom scale in the school’s elevator. When the -)tj-yqg+ n,w c fy1*wxy cd8zscale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weis4:shr;yb pdw-yce 2,ghtless” because

  06.16: A scientist in the International Space Station experientw0f 4vx;c e,pces "weightlessness"cvf,e;x0 pt4w because

  11.10: A string of negligible mass conl4,wap t2 j(kenects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward speed of,2 lteawkp4( j 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 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=p6*-sg2 p rkj ,4rfik-i5t t.hj/pbd8 f z;rcf10 kg to the ceiling of an elevator. The sfi4f jizj5rk6* /, r p-d2f kpph bt.gt-;c8relevator experiences 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 horizont9/b a6g9y0*c knre frhal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string c6e*9rf g y rn0bk/h9aB 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 cobfh s;il*a2 8oh65iyw7kk 1 vynnectedfa; 5l1 6*io7hhyk2 v kby8isw by a massless 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal b t1* kzm+5g,4pbgxmlfrictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a secmtbxk, 4z g1p5bg+l m*ond 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 awwg;g8o d08khh 81 ser horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X sghk 88e1; owr8g0dw honY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are conneo2 9 hr8wj1b)asr,vs mcted by a string which has a tension of 2.0 N. A force F acts in the directib8hav 9r, )mrsw21sojon shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a fro+id+b0a6xmcapss *1w-..fh tza b, q ictionless 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 theq w-6m 0 + baoip,adc.h1z*sbsaxf+.t larger box, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contabo-e3rt8txl. t5ox jlt 6urze b75t h1w3rh.9ct on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto 155exh-9zruobhte6t3 ot7tbr 8.jlt3 . lwrx blockY?

  94.25: One end of a massles3u)xt ou03 vx(kx y1yts 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 frictiontukx1x ux30vy o3) (ytless 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.ekk6fp 1tjx2fk le8 y6b0oz7a s9*, ue0ftb+v0 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 te* 1xfa 0t+,2tk u z7bf kflp6jy69eb8ovke s0he masses?

  02.36: Two masses, m1 and m2, are connected by a cord xr t,w/w /vsne jo2rnk56f8;w and 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 mass of theo w e 5;82t,rswr/xn/v wf6kjn 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 isplat51fe+ rw ca*zr ftw10(ta )vpced on top of 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 +tfwpwa)zra1ftt5 v re (0c*1 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 u)-pfk9 fg/g y od64turniform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically k/- gpdu 6yfto)g9 4rf2.60 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 horhqkkq m9u)- zi* 5x:znh8g2gr izontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The co) im *k8 zqrn59x2hggz:q-hukefficient 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 norma2dfb h7c6k,d el 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 directed upward, parallel to the incline’s surface as shown in the figureh 2dek,7fbd6 c.