96.30: An 800-kg elevator accelerates downward q(:x6gf ;zbyy 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 sn nh *7 et-o9b1w9qcbgcale in an elevator. At the instant the elevator has a downward actb-ecq 7hgwob*19 n n9celeration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighikpx(:sd*nm(upi 0+kbr84gpk ,vxz,v ng 500 N stands on a bathroom scale in the school’s elevatorvv,z(:+k (sb rpmiug 08*nxp4kk p x,d. When the scale reads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shutq3yl5 v6uy.rdje5z6gg t u :fwwn/;) ctle are “weightless” because

  06.16: A scientist in the International Space Station experiences "weigh1l3 wi1 / iq6c2iwdw9xqq a:rntlessness" 6 nq rdaq2i1wwlxi q/3 9w:1cibecause

  11.10: A string of negligible mass connects kxk /oumf24:m 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 themm xk4 :2kouf/ following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an object oc+ad 1zf(su 5xf mass M=10 kg to the ceilin 5s fd(z1axcu+g of 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 kdb96 eody;;vrde09m bg mass on a horizontal frictionless surface are connec90b demb9deod 6r;y; vted 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 B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a-o-twnrup *) h horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface by a second string B wit--*wtrupoh n)h 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 frictionle64c0 dev91rien2qjjt qc8. ej ss surface are connected by a massless string A. They are pulled horizontally across the surface by a s2cei j4cqvd0e8njq9t. r6j e1econd 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 horizomxiqpb8h *q pud,)1;jntal frictionless surface. A 36 N constant force is applied to X as shown to the right. The forp;piqd)m*uxj,8q1 b h ce exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are conne3yvfbz em(qo,ipaf94ws r/ch;*3n0tcted by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right.rypb/09s mhn;tv3*c,4efiq 3fo ( zwa Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a frictionless horizontal s dpwail (0h67,+c kbjsurface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass o h0sk+b6 (7lpwic, djaf 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 f.0 6bkok+4 uh e+kjxez.yo cq(rictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of the force that block X exerts onto bloceyzhkceox+o4+qj. kbk (06u. kY?

  94.25: One end of a massless rope is attached to a mass m; the .ow1d 7fm+ypy.jb3 2 peenp :kz.rov* other end is attached to a mass of 1.00 kg. The ropeopefpjw:y*vb z yronm2 +k3.7.1d. pe 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 is hung ov*d w(ond.ysjae mxs,2fz0;4;*skgmw er a fricmx*e2dd(*a w jo;y40 .nm ;zswfkgss,tionless, massless pulley as shown to the right. What is the approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as0g ywwu5 ;;;9kht5k -fvlbfuj shown in the 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 corgjf;v5-kf0 k9w u;y; b uwtlh5d were known?

  02.42: A small box of mass m isplaced on top)n-n 2 xohyobxiqv(j93c1r 7 c 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 acceb12 yorcoqijc7xx h)vn n3 9(-lerate 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 has anb:z9vg0 hugzt6gs ah 47+pt-v initial speed of 9.0 m/s and rises vertically 2.60 before coming to a94 vp6h0: thgtggbvzz+ us-7rest. 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 f+2me cv7v 1(uvevq8m mis initially at rest on a horizontal surface. A constant horizontal force of mg/2 is applied to the box, dir e vf7me+v1cvqmv82 (uected 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 gravitatione-aixf-m c4k(4.vn oeoe x 46kal 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 describes4-mx ee ikno(favo. 64-4exck 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.