07.10: Contact forces are examples of which of the fundamental fomk;/p,ahdhja8jbx/e, r : d ;hrces?

  99.02: Which of the following terms is NOT related conceptually to t 8s4cou3ol w*rhe others?

  02.20: The graph shows the relationship between the mass of a number of rubber cj )v5m1jg /yf)ej*gisvyg j1c gm/5j)j) fe*itoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, label6z 0kbwtor+h 3ed A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C fbhk3tw0 r z6o+rom block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a sernx6dh 7ao,ld*3w i 1ewies of strings as shown in th ,d* w1dhwiol7n6eax 3e figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6. .wr(x ha,km(0zsn0;o; hnac d0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following ch0co mwxk nn0ha;(rd (a.sh,;zoices represents the tension in the string connecting the masses?

  14.13: Which one of the0m3bum (u w0ht8+tsy z following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, t0t hmy38swbu0u(m+tzhere is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying fpp2q0qqbge dvc -t)-.9eg u7uigure, a force F is exerted at an angle of geqdpp- u9 .tegvq 0cb)2q7u-$\theta$. 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 a4zr 6ersie8lg*lvvh1 pd dh- //l,ee-long a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be trup6-hv/v8*/ei ezhe- , e4rdsdlrl1g l e?

  99.08: A weight can be hung in any o4ee) yjx;/j vbf the following four ways. In which case is 4je/eyx);v b jthe string most likely to break?

  96.39: Assume the objects in the following dv2swudwh8l 0+ iagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to brea 8h v2lu0sww+dk?

  16.10: A person wishes to accelerate an object upward unifo 8u0lv5zf9z jg y;jd6ermly. Which one of the following choices must be true yz;d58jf96 l vguje0zof 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 of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-vjvtpt/ z/: 1uaxis, at one instant of time, the mass hasv:z/v/ut tp j1 position 2.0 m, velocity 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 is pushed to the right on a rough surface by a horizog(ag /fdya6 3d*d d-pgntal force of 15 N as shown, during the push, the object aad gg-gp3y(6d*fd /adccelerates uniformly 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 figure to the right 1- 3 nskzgnfc //bhdu/khk5x8 is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient ofznh/ux3kd/kk s1 8n-hbc /g5 f kinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests omg:c985: bpd0mqq abzn 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 pullsuy *3 nin-q33nna3e9tnl jj)ed across a horizontal steel plate as shown in the diagram A. 9n-a j3nqyl)3nn 3e* nsui3tj
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 the horizontc-ng*fg +djs ;;rbqo 7qe 1d0tal. The block remains at rest as θ is slowly increased. The magnitudes o0dqd7 f ;e 1ogjsb +*gq;nc-rtf 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 za ky v:,hny333sx 60eosv(wyb /ak1 bangle 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 second plane (where friction is si f*,* muyu3 ii,m gypev wh95,r5svqg:gnificant) in inclined at the same angle, it willq5sp9yf ,gi3 ve,r:g*wu5iv m, *muyh begin 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 m.. zs hz)gyekbw :diwa33n 93eagnitude 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 figur)bh:nk 3 s 3gwzw.de.9iy3aeze? 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 pw lf3p66 7znevushed at constant speed on an inclined plane. The free body diagram of the obj6e3v 7lfzp wn6ect 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 one of the following choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5.0t g2ifvr86to* m/s straight up 6 fg*8vto i2tra 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 misplacer-1n fr j*lx/2.eywjg) pfbg vmbn;1-d on 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 of static friction between the block and inclined plane is 0.92. Which one of the following choices best represjbr ev;gfn 1wx)-rgyl1nf-* p2/b.mj ents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top of a frictionleguq z94 s7zx8hss incline. The inclinehas a mass M and makes an u98 sxgqzhz 47angle θ with the horizontal. The incline remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?