96.30: An 800-kg elevat zh 3bqraqmj4j m:8nd(+ qby+-or accelerates 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 t.v p.31oi /htusr0pm8b t /efdz2xh9zhe elevator has a downward acceleration of .hpm 3t o20hfveids1 z/8.b uzptx9/ r$1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N st qd6 8nny(ilk3ands on a bathroom scale in the school’s elevator. When the scale rei( 6 nl3nqykd8ads 520 N, the elevator must be

  00.12: Astronauts in an orbiting space shuttle are “weightless” be2 :eqzkh,r 9dmcause

  06.16: A scientist in the Iqmqm*w89hm *xh+ yjt7i(qk:cnternational Space Station experiences "weightlessnesq:x8ihtq m 7k(ymm*j+ch9*q ws" because

  11.10: A string of negligible mass connects an object of-wu839qp-uve 2ix.wl x/pn kh mass M=10 kg to the ceiling of an elevator. The elevator experiencehve -u2 -wix3lx8qp k9/p.nuws 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 negligible mass conp*vwcxj. 4m;7ubpm*jnects an object of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward accelewcmmxp;jubj pv 4.7**ration 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 m08. gfezqvn96cu 6xuqass on a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface g9u6 n8ue qxf6czq0.v 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 bj )tj4q 3l me 88uq-sbfd-2;1rzm ddhhorizontal frictionless surface are connected by a massless string A. They are -;l s88tmrm2 d- )dj1dh4fq be3qjzub 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):rfd z 0;nog zc0igl+ surface are connected by a massless string A. They are po zl:gi)+;drfg0 0cnzulled 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 +lx./959s+oawt btce7 abcn b contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown to the right. The force exerted by X +nt cx/bto 5cw9alb .be7+sa9 onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are m,jrxc .ut;z010 kfjdrp( e-g y6tl*qconnected by a string which has a tension of 2.0 N. A force F acts in the direction shown to the right. Assuming friction is negligible, w0(xt, gyc-qjrkt mj*1up zr d0.; le6fhat is the value
ofF?

  99.12: Two boxes aredl/.4tl go4zo accelerated 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 what forl4od /g4tl oz.ce does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contact on a fric teeih. ,uj1k-tionless 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 o,te.k 1uejhi-nto blockY?

  94.25: One end of a massless rope is attached thmod)-anr7vc / .1gc go a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung ov1 cm.gh -/7gnorda vc)er 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 mz; bp-wd( 2c2f esmw7dasses of 1.5 kg and 3.0 kg on its ends is hung over a frictionless, massless pulley as shown to the right. What is tpsce (dw b7mw22;-zfdhe approximate magnitude of the acceleration of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arranged as sh .x fn9dj03bh6 rksiqc:x-ru) own in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a likdq fixrj :b3rn)ch.x609 s-ught 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 o hfr m 7ew56eew8jsa4s)(+ puof 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 wit4asrwu7ops 6(e) ew jhfe +8m5h 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 wixw v jyd 6-132dg1 -vfs*c ,eqwft+owrth uniform acceleration up an incline. The box has an initial speed of 9.0 m/s and rises verticalx qwv wf2ce6jsf- yd1ov3-,g*+1 dwrtly 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 co+ l0vi6zc6 n yog/nvs8r -olm-nstant horizontal force of mg/2 is applied to the box, directed to the right. The coefficigirl yn/v 8o -n+msv l0z-6o6cent 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 invt3v9m0x4kj6d ws fc(cline has a gravitational 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 describes the orientation of the applied force by the person? The +x-axis is directed upward, parallel to the incl 34c0 v(9xvdmsf6wtjkine’s surface as shown in the figure.