96.30: An 800-kg elevator anie60 qpgu:wdu :x 8*hccelerates downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg studenlss:7uxou8dc9jzsl w,6zmg 6l f9v45t stands on a scale in an elevator. At the instant the elevator has a xc f6w s:9v87uldosllzm5 9,ug6 4szj 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 shk jue+vl xu0bgl965+rp 6h/g w oer6)chool’s elevator. When+rx)goehp ek 6lg6 r/9 uuh5j6 vwl0+b the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle arb.1o8zw/ stx( ljk+gke “weightless” because

  06.16: A scientist in the International Space Station experiences qetc/h*qi ag1 7j;5ck "weightlessness";5 hc*qekq7 ta1gcji / because

  11.10: A string of neglizmi t5 v*pr t:/z6zseron4 8p7gible 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 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 r4mpi6 8z* st/z vetn7p5roz:, 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=10 kg to t( +r1zq 0nok+rhhfohw(/ l,wkhe ceiling of an elevator. The elevator experie+ +zl1(/oh qwrhonf0,r k(hkwnces 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 surfa3)xtt,p-ndbp c7k 2xo8pai0 qp+ 5lbr ce are connected bipo+pxpq-p nk23a)d 7c 5,bxb0trt8l y 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 B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal frictionless jj)ey/. hzpb -x *d9arm-c)jesurface are connected by a massless string A. j-dpre*a. cx)9jhe)j /yz -mbThey 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 frictionless surface are connny0yapu1 *7z uected by a massless string A. They are pulled horizontally across the surface by*uy pazy17n0 u 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 op)ot) l+z9evc n a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the righc)9t )leoz+ pvt. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.07bz( n)e *znma kg are connected by a string which has a tension nezm*n (a z7)bof 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accrkz :n0fh h2z.zs)y,pelerated 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 on the larger box, with wzrk y n)p2,0 zf.:zhhshat force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a frictionless .dkl7 dwo:li( fznl 03horizontal surface. A constant 35 N force is applied to the right onto block Y. What is :3dzl lo .(l0fdnwk i7the magnitude of the force that block X exerts onto blockY?

  94.25: One end of a massless rope is attached to a mass m; the ots66 nwnv8d3 vcv s3/yqi( sua-her end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accompanyq 38udsi6/anw -yv6c (ssvnv3ing 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 ihqd6*y,f 9 bxhb-ytuq l3e7w+ s hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude,dw h3qqub y7-ex6b9 yl*thf+ of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as shg/nsq-ybvkag 8d) 36wown in theg/s-d6vw8kn qay bg)3 diagram with 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 isw: skst3vi+n2 placed on top of a larger box of mass 2m as shown in the diagram at rs+ i23 ns:wktvight. 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 inclm33yl 7lrgelvrkwk()7e ;wz .ine. The box has an initial speed of 9.0 m/s and rises vertically 2.60 before coming to resl lwe ()e. 3vl7kygw3kzrr7m;t. 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 resn cg.p* iqiklbd98-x ;coki09xn 4wm6t on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coeffici84qk*b96 ix0;mco9gnl-dxci k.w pinent 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 incli7qu e;d8o +oc;0loeb zne has a gravitational force,a normal force from the incline, and a force applied by a pered0boec8;7 z uq; o+olson 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.