96.30: An 800-kg elevator accelera,3tpl0u4tut+l cm l. ctes downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg studenr 30.s5pauion t stands on a scale in an elevator. At the instant the elevator has a. ir53u0asonp 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 bathroom scale in (jhp( mco u87qthe school’s elevator. When the scale reads 52(p8hq(7j mouc0 N, the elevator must be

  00.12: Astronauts in an orbiting skns xm* 9vkpy c-*fz14pace shuttle are “weightless” because

  06.16: A scientist in the International Space Station experiences "weightlesbhk-np s,( 6gwsness" pg(b ,s h6wn-kbecause

  11.10: A string of negligible mass c c.x3uyj4waz2 pcjzu8u.*)ebonnects 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 8uabcucu.p y ej3)z4 .2 *jxzwacting 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 Mqvj.mk:pe u5-z*a+ k w=10 kg to the ceiling of an elevator. The elevator experience*e m+:z5.p uwkjq-kvas 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 frictio-zv e4.bvf9p snless surface are connected by a massless string A. They are pulled horizontally across the surface by a second4v9 bzf.-vspe 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 arzj :z)lfd5.i xe connected by a massless strx:ji5 z.z ld)fing 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 oh,jd xcq 7qwq*;7d,hf: p1 va6c m.jscn a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the s xs; d 7p1vjw,hdcm 67.qq*:,cjhfqacurface 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 frictionlmgwb5) yf.ysdw3a 4v6ess surface. A 36 N constant force is applied to X as shown to the wsdaw 5.3fv g) bym6y4right. The force exerted by X onY is:

  97.31: Two blocks of hxob u2j28q/,org kia-7nzh 8mass 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 right. Assuming friction is negligib boug28azhjq,- on82i/ xk7h rle, what is the value
ofF?

  99.12: Two boxes are accelx64 cz*tqee 1lerated 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 * 1cextel6z4 qmass 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 aiwbo yc anu,ka +f7j.wkj8vc:g0mgze 9 .567zndY are in contact 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 ex bjc ngmy 70.g 8u7,ezikzok cwa6v.w f5:9j+aerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; thed/6 puvtb,hnq8 +ulc4 py7uredn69-p other end is attached to a mass of 1.00 kgeh6uqur-ndp pu,y9c78p nvl4bt+6d/. The rope is hung over a massless frictionless 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 en/fiajms. x4ry -b lw(:ds is hung over a frictionless, massless pulley as shown ajfxs /m. y-ri4(blw: to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by w.amm p 99ei3f(yl z*y z9 kwqki4j4n/a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless puqfw44/pz9ij9 ek m3.i*m( yn9yw ak lzlley. 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 m)m4wy . 8x vg6bcga2evass m isplaced on top of a larger box of mass 2m as shown .v mg6yv48 gaxwe bc2)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 μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. Ths-wzm)1gp2rl t fe 8*ue box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. If the angle of the incline p m -sezltu1w8fg)2r*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 constan,qy. n f;4jwyh: a6o.z v.n-hh,wkva kt horizontal force of mg/2 is applied to the box, directed to the right. The coefficqwn.a6o;zhf na,4 vh..wk -j,:yvkh yient 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 incvxaobeu l p5 ojrr126o 9.8+ fnqf0vx(line has a gravitational force,a normal force from the incline, and a force applied by a person te0vvo x+ x r5jr8 bfl(o26a.npoqu9f1 hat 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 figure.