96.30: An 800-kg elevator accm xdf;5k:vubf .s0ryzu,s;;zelerates downward 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 the elev7qh sies-79;yiwc qw0aqqhsyw9-wi 0;i ce77s tor has 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 scale in the schoo x * hgz:+h5lnozh*y,hl’s elevath,go nhy z*+:5hlhx z*or. When the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle9q* *g d6,zumzo:sp -ecd)rby are “weightless” because

  06.16: A scientist in the International Space Station experiences "weight.ya)i h):jarq k+ bx0klessness kaax)ki. q)hy:b+rj0" because

  11.10: A string of negligible mass connects an object of mass Mg ec5vwcc;1.ab7/g xr6g y o ).ft+yot=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 gr.6wgyat). yofg+;v7c /e ct bg co5xr1avitational 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 plt/ :gc5b f3(0bmyarconnects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a/g btf(r 0y53cbm: lap 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 ov qduaemz5qu,e7)n ub * 0pnvi q3;**mn a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a seconddq p e7,z )*nqbim*n*q3;v0amuvu e5 u 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 onw y 3o **kdzqqtl79ue. uplr1: a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across thel:opz *.qq1etlr3du y 7w9ku* 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 7 tbned38k9v1bceo5.uz (nz da 4 kg mass on a horizontal frictionless surface are connected by a massless strin e8.utndvb n7 (de1z39ocb5kzg 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 net force on the 2 kg mass?

  96.33 : Two blocks X andY are in contac0zai fwa1 9lm-h;poq (t on a horizontal frictionless surface. A 36 N a a(p-wz ofil19q0;m hconstant force is applied to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a q .*wxgvc w(3ck*cj0gstring which has a tension of 2.0 N. A force F acts in the direction shown to the right.jcw *.(c3gg*0q wxkv c Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionlet ,na j2mb04enss horizontal surface as shown. The larger box has a mass of 9 kilograms and the a nemntb 24,0jsmaller 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 and6y.ohfls2f,( lw)vyi 4:l iov Y are in contact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magf4 oyy hfw vli,ll:.vs(6i)2onitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attachesb87li p0e )rzoz bd:2d to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over a massless7:zs op 0z)2rlbdei 8b 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 kgtzd7 ;eafj m6+. ,zji aes4z+d on its ends is hung over a frictionless, massles dad +mzteajs6f.ije,7zz+;4 s pulley as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m13hs uc-6yjo e(wrh( *vgk/6fp and m2, are connected by a cord and arranged as shown in the diagram with m1 sliding alku-*c/sow( p je gvhyf6h(r36ong 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 of a larger box of mass 2m as shown dms4bb+et.zx2-iy h4 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 smalmd.xb-+s4h 4 tbi2yezler mass?

  17.25: A box slides with uniform accelnzogr 9f97l 9l4hi)j zdx/g(fjk+r ,ieration up an incline. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to i,ffgn idxhl)j g 9zoz9 l94r(jkr/7 +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 initivct m8rs-6d gdi o(c 7(e/h+tgally at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the bos-o+ehc /tr (d7tvg(c g6dm i8x, 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 gravitational n6kf )23bbftyk:p lr) force,a normal force from the incline, and a force applied by a p)kk6rf l:f3 )b n2btyperson 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 figure.