96.30: An 800-kg elevator accelerates do2;w c2srr,l5 fa z*chawnward 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. At the instant t3k4x(lu /lw rg1ser n573 oryshe elevator h3s1e5nw r 3k/(ls uy 7r4orgxlas 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 bathroom scalcyo-yu(1m k fk;1oa 3ue in the school’s elevator. When the scale reads 520 N, the (fyokko;yuauc 3 1 -1melevator must be

  00.12: Astronauts in an orbiting space shuts.il um ;.vddyou uk.yjh:do4, q32, jtle are “weightless” because

  06.16: A scientist in the Internatio ,s;od-.eql7 ys1kq3l/hazu ydv. rf3nal Space Station experiences "weightlessness" becausq.ys k/vu1, zf3adsd-o .;l3h yqr 7lee

  11.10: A string of negligiblry13 e5.xfehry02ha v 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 ofef.x2rey1 va0 yhh 3r5 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 ma poshh v(sts0n b*k197ss M=10 kg to the ceiling nst* hs9v ksb0 hp7o(1of an elevator. The elevator 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 horizontal frictionless surface are; jecb7y/(v wh connected by a massless string A. They are pulled horizontally across e yh;(vwcjb/7 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 frictionless m.v0qixnmqyn+k:-uh;7cxn 5 surface are connected by a massless string A. They are pul hk 5:xq xin7u c;vqym+m-nn.0led 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 horizontal5-,xhoeni wf7s,2-r ot l4tdu frictionless surface are connected by a massless string A. They are pulled ho4t,f,i57unwroot-ls xed- h2 rizontally 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 a2. cq26kf.yi 0cbbrn /io5nn a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exe.bobca 2i ycnn. f06k 25r/nqirted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are cduqysb1+,su yg4 rh:ddr 1,v.onnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming frihqsb1:s4 .d,y+ u gv,r ddryu1ction is negligible, what is the value
ofF?

  99.12: Two boxes are acg05+oafx *)bj5z,n tqunzba m1*fww7 celerated 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 o*7ogwqaf*0z tjnfb, bwa5n x+ m)u5z1n 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 frictionless horizontal sude5 ; k,jo+z6brhky*orface. A constant 35 N force is applied to the;zdey5o kko6 b*+ ,rjh right onto block Y. What is the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless o ej; t ilm(;g+f+oeo1gyo6)dsa.3j krope is attached to a mass m; the other end is attached to a memoag3 d jisjeto1g+y(ok. of +;)6l;ass of 1.00 kg. 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 eu 7 +nflmt(j3pjz5nks7 k(3dands is hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of+(7a jn5 z kl(73jtusnmdf3 kp the masses?

  02.36: Two masses, m1 and m2,4:woa jn5ii0 e are connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surfaceoa:j4eni 0 5wi 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 gp ba;0uh;t0i isplaced 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 right with the same acceleration. The coefficient of friction between all surfaces is μ , what would be the bagu0ti0 p;h; force accelerating the smaller mass?

  17.25: A box slides with uniform ac+bctoqjx+yaca y8 0e)/ /w 3qrceleration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to rest. b /c)0+8j+t rxeqacy/o yw3q aIf 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 surfacekas1x;f/0jizg bu4a / . A constant horizonta/xa 0aui bg4kj/fs1z;l force 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 gravitatn 8gl4, plfy+zional 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 glnlfz, yp4+8the 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.