96.30: An 800-kg elevator ) max;730yzo2clr i x0 z,u4iqwt7hjoaccelerates 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 in5 p dj+ez6c fusccp:k8rx./d 2;rrw3q an elevator. At the instant the elevator.2x8:ppfd+zcer36ru ;c/ dqksr5c jw 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 bathroo1 iiac+nct4u ,hnc:/f m scale in the school’s elevator. When the scale reads 520 N, the elevator must beahc u:1,+fcc4/n n tii

  00.12: Astronauts in an orbiting space shuttle are “weightless”i ebm)f+v +3t7vezh;(9( bxyomxu 9tr because

  06.16: A scientist in the Internation(d6+kvi pxeg vjbxir8y(f 3.u.: ir9eal Space Station experiences "weightlessness" becdviik8.fb :(6ve.3gu pj(re xi9 ry+xause

  11.10: A string of negligible mass connects an object of mass M=10 kgtc, ,vu2db4bz -nwpg1 to the ceiling of an eleb4 zpuvdgn2 ,c-1bwt ,vator. 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 describes the relationships between these forces?

  12.10: A string of negligiblil+nj be.g,r ;)e doi1e mass connects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleration ofog1 e inr di.)l;+bje, 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 friction5s t.sgeg 7p/0 ixpw0tless surface are connected by a masslwpge0/ 5 ps7xtt 0gis.ess 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 frictionles ehul*0;1uh4 bzut9ims surface are connehmb0iu;*e14uuzt9h l cted by 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 A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontalse2 ls9 2b3o*-fc t2.iqiynbab y5*lnt-:i eu frictionless surface are connected by a massless string A. They are pulled horizoint cnls2 au e*ebq2b9isby iyot:5 f2.-*-l3ntally 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 a horizontal frict13lu7zov jkdb14+p j - go(1k . qgswx(jvmlc0ionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X onY is:g.v-z34jm xo( qkvb+lg0w d(1jkusl 1c1j7po

  97.31: Two blocks of mas(efd;-xznmzejf4gf;px 6+ny 6 p9/a 6epxog 3s 1.0 kg and 3.0 kg are connected by a string which has a tension ofp g6-nfjg6 9 n 4efpe;6+; x(zpx3aeyxm fod/z 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 accelerated to the right on a frictionless horizons vg;vv: r7tspjipv(n8 89t a5-e9jcn tal 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 what force does the larger box pull vvrip n:- jv s ;ajpt7e8n8s9(9v5tgcon the smaller box?

  17.15 : Two blocks X andY are in contact on a frictionlhv)*a* jv vhs4ess horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magni) ah4jvs*h vv*tude of the force that block X exerts onto blockY?

  94.25: One end of a massless o p8xur vt6ljm 4x0*:orope is attached to a mass m; the other end is attached to a mass of 6oxj *xrlout8:0 m v4p1.00 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 ends m )792 swjq fd:,kcpxgis hung over a frictionless, massless pulley as shown to the right. What is th:2w x7sp j9g)kqfmd,ce approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 a1tu :k/lf3,uoet5 f9v.hlayx-v1 sex nd m2, are connected by a cord and arranged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging frv .t1flt:9 v yf x/ek51u-ohsa le3,uxom 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 isplaiwdpt1 e.e2.sced 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, both1 sd.wetpi2e . 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. The box ) u8rl0) ljkfahas an initial speed of 9.0 m/s and rises vert)f8 a0ulj rk)lically 2.60 before coming to 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 initially at rest on a horizontal surface. A consti :,xk)2dx ej-u6 tpraant horizontal 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 je6 kx-ipr),:uat x2 das $μ = μ_0x$ 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 frictionl m.v5(tx ti5vudd5n0sess incline has a gravitational force,a normal force from the incvdivt5du ( 55 0s.xtnmline, 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 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.