96.30: An 800-kg elevator accelerates drh+6 j *syxf8:m. esemownward 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 elevator. Athoq-3 9j.i y(t9oqcg m the instant the elevator has a downward a9.hqy9ojc3 ig -o(mq tcceleration 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 sl*s3vl9gz)x., gu er1xyf8c ocale in the school’s elevator. When the sle. g xv,l913xc r f)syo*8zugcale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightles1 fzy/7vu h iufz .syx00r2ri8s” because

  06.16: A scientist in 2jw ypxfrv h-p32o6d -the International Space Station experiences "weightlessnesr26p 3 ho-v2- fywxpjds" because

  11.10: A string of negligible mas4aub9wy8)m uvs 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 in the elevator, and F represent the magnitude of the net force acting on the mass M. Which one of the following choices v)b mwu 8u4ya9describes the relationships between these forces?

  12.10: A string of negligibleqprcrps 0d5 4* mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a 0s4dr 5*prqp cconstant 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 kgs ewk g+t,7kpnvv/ i61 mass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a s6v g+wpkkv,1 es/i7n tecond 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 pa0cwgh iz, .:- q8nrymass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second stringaiqw :8,rg0pc- .nyhz 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 frictioni.cq bn0.1dcx; tx,x1 /h cdwtless surface are connected by a massless string A. They are pulled horizontally across tcc dx1ht1dq.x.cbx i;w/, tn0he 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 sc/ )u yqtogzid0lz4ig 1 7,eb/urface. A 36 N constant force is applied to X as shown to the right. The for1 qozg yi)/d g/7 l04uce,itzbce exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3due u5qr5 rq49j,sek h+v48y o.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 negligible, what is the value 5+8ue u5 44 osq,qhr9kredvyj
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal sk:.8 be9e; ui 3yctg9k 7vuqvcurface as shown. The larger :9. v8iby gqukcv e;7ect93ku 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 frictio1 dx7 yoyesj )wim:h-1nless horizontal surface. A constant 35 N force is applied to the riwi 71 jeyy:-)1dhosxm ght 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 attached to a mass mafy)gx 1ku ,-n; the other end is attached to a mass of 1.00 kg. The rope is hung over af gn )x-kuy1a, 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 ends is hung o:*e*s *iub g.pgpxcu* ver a frictionless, massless pulley as shown to the right. What is **.:c*g guxpipes u *bthe approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged asdek*5n akxaq ( :qdj/) shown in the diagram with 5jn/) kea(qkq:xad d*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, in the cord were known?

  02.42: A small box of mass m isplaced on top ox e1 qht x)44)xnobjfqfl36c7q/ (bkz(b3 yfsf 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 acceleration. The coefficient of friction between all surfaces is μ , what would be the force a3f()1x tfq k6/xz47c4() bysj b3hoqqxnblf eccelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. Tha p, s9fedfb;*e box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. I dff,*bspe ;9af 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 surffqib (r3)20re7sw0g abqv gx *ace. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface ew*s72a0)xqr gv0fb( r3g qbichanges 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 g hzvnv 1kf9/g)ravitational 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 fvkv/n 9)hzg 1the 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.