07.10: Contact forces are examples of which of the fundan )nj8kqm9h.xk xm;8jjqe-n 5 mental forces?

  99.02: Which of the folloy()tkywro;in2q9y: g wing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationshi b+b g9pqi bqs;d/2f3r5: hou b:g5jlxp between the mass of a number of rubber stoppers and their resulting weight on some f qb:q +b/fi9orlb2sgg :5hux j5dpb; 3ar-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on aicbdr jvzb8u .7 v9:3a table. The magnitude of the gravitational force on each bv9dzb7.ucbav:r3 8ji lock is indicated on the figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are sus1ivsf+yv e oh:r *,q0fkow(t.pended from a classroom ceiling by a series of sfs(,* +:iwkv .t r10 vqoheoyftrings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and thes ibigy;;:p;z mass M = 14.0 k。are stationary. The m;ys izb:p ;;igass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associatemdxh4a-9 fa s+dnn 4i,d with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proporf ad+4h mdisna,4n-9xtional to the displacement.”?

  94.26: As shown in the accompanying figure, a forcps7k l(gg94r ie F is exerted at an angle of g79pk ilr4g( s$\theta$. The block of weight mg is initially moving the right with speed $v$. The coefficient of friction between the rough floor and the block is $\mu$. The frictional force acting on the block is:

  95.34: A student pulls a wooden box) : krn4 wofan(4fm,75wtyqxk along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the followi5qoa 7r(,4kfn4m)nwxwk :fty ng must be true?

  99.08: A weight can be hung in any of the following four waylm (6 2mmkfdt3s. In which case is t(k623lmmdmf the string most likely to break?

  96.39: Assume the objects in the folloy4( hu0g k(:n2uwkw nswing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely tou2n(k(4 wgwky0u:snh break?

  16.10: A person wishes to accelerate an objec.f we7bf1 ioi;(zjap83dt z m4t upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W represents the ma4 .i a7t1pf3 d jwb;(mifzo8zegnitude of the gravitational force acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along 3k.w zz(u n:v6m91a/do eghcc the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,anh:(u3kw gc.ecavodz/ 691mznd acceleration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is pushed to the right on a 3 zd88x cupd8x))nddrf+g :w yrough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right a8+:zd)g8d crxd 8)wpfdy 3unx t 2.5 $m/s^{2}$ . What must be the magnitude of the force of friction also acting on the object during the push?

  96.32: The 10.0 kg box shown in the figure to the right i:8 g*-tdk hrv jgx52:ktd-efis sliding to the right along the fl thigdk-*:-vx 5:r8gef dtk2 joor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on av2f8 wg( 1ewrd flat plane inclined at an angle of $30^{\circ}$ with respect to the horizontal. What is the minimum coefficient of friction necessary to keep the block from sliding?

  99.32: A wooden box is first pulled 5e1rvzpm n++tacross a horizontal steel plate as shown in the di1rzve+t nm5p+ agram A.
The box is then pulled across the same steel plate while the plate is inclined as shown in diagram B. How does the force required to overcome friction in the inclined
case (B) compare to the horizontal case (A)?

  07.09: A block rests on an incline that makes the angle θ k4vnvs91trm. with the horizontal. The block remains at rest as θ is slow.kns49 vtr1mv ly increased. The magnitudes of the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle o dg w60dlej o6guz93q+f $30^{\circ}$ to the horizon as shown in the diagram below.

What would be the acceleration of the block down the plane assuming the force of friction is negligible?

  01.12: If the block is placed on a second plane (where frj uf.ar 0zq2;ziction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between th0z;r2 zau.jqfe block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of r: l9zcjrs5.amagnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordinate axes shown in the figure? The y-axis is pezr: 9aj rcl.5srpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at consta aj.6ee+8xv2q ,rkitint speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the applied external push parallel to the incline by F, and the normal force with the surface by n. Which onxt 2+a.ievqr,e ijk68 e of the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a cons.a psvxu;o/) t ;ncn wtiy8 .odc)l-;u4wo+cptant speed of 5.0 m/s str; u4cntpo c-v p it;)xdo.cww.noy 8;l)/ua+saight up a flat surface inclined $30^{\circ}$above the horizontal. The coefficient of kinetic friction between the block and the surface is μ = 0.40. What is the net force acting on the block?

  14.20: A uniform block of mass misplaced ono +cwj+ )m;k*icf q22wjcoh/+ ub xwu; an inclined plane of angle θ . When released, the block does not move. It is determined that the normal force acting from the incline on the block has a magnitude of 62 N while the force of static friction acting on the block has a magnitude of 38 N. The coefficient oxbf i;;ccu2u* omwwj+jk+ cw+q)2/h of static friction between the block and inclined plane is 0.92. Which one of the following choices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rbuokg5 c+ f5)0if5fwx est at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains ifox )50k5fwbc+ u5 gfat reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?