07.10: Contact forces are exampl+o :mhdcq5 vb9es of which of the fundamental forces?

  99.02: Which of the following terms is NOT related k e-oa rj84,2 b0mycgmconceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of ,6jnv :bl g)1tzs6m*6b vvsc hrubber stoppers anb g)zn ts6jbsm61vl c,h6 v:v*d their resulting weight on some far-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 p3aj )7okd 92stggkaw ,(r aj-a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of 73jjkta9 swaprao -)(g2kd,g the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceicif 4f.yhlkh tbz j+5*u/7 k7fling by a series of strj4 u/7 *f+ ih7y5fhk.z ltcfbkings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are stac 9lr,ip2zga a6y/:cz tionary. The mass M rests on the floor. Which one of the following choices representslgaaz 2z c,/9 6ryc:pi the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with th pw)g 4o4 :5nwkfdg,sie following statement: “For small displacements of an object from equiw,igdon 45)sw gp:fk4librium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force3 z2d63 op 9zww0bxapi )eaoqh )r(9bk F is exerted at an angle of z9 2i)b ax3brw)pwkqah(0 3pzedo96o$\theta$. 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 along a rouwsahb 4nefw c:8od+ 9 bd m8q5;zn7nj1gh horizontal floor at constant speed by means of a force P as shown toannc8:1seboq7nh fm d+d9wbw j 458z; the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four waydny:ww6 wwh4 3/gtotr g x;.9qs. In which case is the string rgtw:4o. dwx/6hwg; t93qw n ymost likely to break?

  96.39: Assume the objects in the following diagrams have equ h7sl6(:wt eo: g0yglwal mass and the stri:g wh(e06ogy7: slwtl ngs holding them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object,q z o52bxmas :(e0bct 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 magnitude of the gravitational force acting on the object. Ignore any effects of the air or os5o,caqz b m0x 2t:(bef the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one ij;z:,m 8 1gve sir9ltqnstant of time, the mass has position 2.0 m, velig,vt zls9jqe :18;mrocity 3.0 m/s,and 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 ,rk*.)q0q zzul l8zx yis pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates unifoz0z ,ukqqxlr 8 z.*yl)rmly to the right at 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 fi hn9,. zg8sgwp-a ux)igure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic frictionsag gphin,9z8u. )xw- between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests qu5wp9o -muv2p( tf4x on a 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 pu 6jcu-0mpm*yvlled across a horizontal steel plate as shown in the diagram A. 6-0pc *ymvmju
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 with nf5msh9)y 0smz :q/kfthe horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on the ykq0mf/ n5m)f9 zs :hsblock

  01.11: A 5 kg block rests xt8 orq8.gz4ron a flat plane inclined at an angle of $30^{\circ}$ 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 spes* l /f2qz7second plane (where friction is significant) in inclined at the same angle, it will beginsl2 * f7ze/pqs to accelerate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitu/p vhd i)p36jvlj5ix)de N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the 5v ii)h6djlp jp)v x/3coordinate axes shown in the figure? The y-axis is perpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant,vn6mb5md7sd- lvf*:xltg bid0 d .n8 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 *dlbd s8 7b n,5ilnv.:tgx m6dmf dv-0normal force with the surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushesqmx x6f-8 5odb/rob+n a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat sumfnd6bb-o +/8rxqx 5o rface 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 on an inclined plane of anvgsjw/ qp-dr5g8 mw8 2gle 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 whpg5g 2/ dqjwmw8s-r8v ile the force of static friction acting on the block has a magnitude of 38 N. The coefficient 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 rest at the top of a fric/51wjxwoik y )ndqd*;tionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thesmall object slides. During thekwj)w/ xd; qn* 1oi5dy slide, what is the magnitude of the normal force from the table on the incline?