07.10: Contact forces are examples of which of the vbs l,dn:t:lqbbh w46 m+o0, zfundamental forces?

  99.02: Which of the fpf (qghkae hk 4.v,l-5ollowing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a vsi31zj6yn w4e8qb 7i number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a repri1w8y 46njeb3 z7 qvisesentation of the:

  10.15: Three blocks, labeled A,B, and: fs /xfg +3smq2nqs 4br6,qyh C, remain at rest on a table. The magnitude of q/ 4sr6qshsffg:+n y q3b2mx ,the gravitational force on each block 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 suspended from a classroom ceiling by a serxrjw6ie.;m iiz4 1jq3 ies of strings as shown in the figure. Which string has the q3 mxiw;1jei. i46jrzgreatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。apr+om/ +w;mgveg:y:t ci1qk 2kd*: zhre stationary. The mass M rest d+/w:1qkm pkizg2;tyc*:+mrv : geohs 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 associated withk1dkvk xz,yks +5*b j7 the following statement: “For small displacements of an object from equil,71 *5bjk+ k ksdzvxykibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the a5;nk +qvk xo -,d17o/5t/uijzj vsksx ccompanying figure, a force F is exerted at an angle of ;-svj,v q5jsk /d1 xkoo x+tn7u5z/ik $\theta$. 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 woodend2q0f. ceg5rw.y e gx9 box along a rough horizontal floor at constant speed by means of a force P as shown to the0cg .9gxd2q5erf .y we right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which case 0yjq/u 5 .5: scidyzkfis the string most likely t5.z /kf:y5cj0si y uqdo break?

  96.39: Assume the objects in the following diagrams have 1c sf6,q 5ym+j2 *nx owiyjql*equal mass and the strings holdjf2o jl,w+5 i nymqs*q *xcy61ing 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 upwaaq; y5xf1q a5nrd 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 aiaqn; 1 55yfaqxr or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the i2blw*3b6(n1xwufp h x-axis, at one instant of time, the mass has position 2.0 m, velocityw 2bpw 1*(xl6ubfh3in 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 rxq s+b1/ y2.vp2pf) brmc/usq ight on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to thevu21bpp +)csq2mq .//rsyfbx 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 sh-xeq/u rt; (yz(dd-i sown in the figure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being appliedzs(rtq- (xi;u-/y e dd 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 a flat plane inclined at :h:wrz6 ax0 c 7txpze,dy,4zjan 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 across a horizovez38; 7xd riwntal steel plate as shown in thed37e xiz rw8v; diagram 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 makex,z4ybbz 2d w:s the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force a2wy4,dbz z:xb nd the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flau82eg u2y eun4))y g7kq)kn(mq(jk. 1 u uhntft 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 secondy hxpo1u w k-0/gr)z4m plane (where friction is significant) in inclined at the same angle, it will begin to accelerate atyow /41kz -xgp)hrm0u 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 gravit y/x8j2 t*) ;rrtebuetational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force *;bjyx) ut/er2t8 retfor the coordinate 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 coik, cus t :nf6o.ehteo 2*at/r9mx1 3znstant 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 norxztn9r3cui*.eaf21:te ohk/s mo t6,mal force with the surface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushes a block of masdy1rt- v kz)bn;8t6jl2gxabd9e8y , bs M=6.0 kg with a constant speed of 5.0 m/s straigety j9bvyr 2gb ,)-;l6a1zdbkx8t8 ndht 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 ,itq+dxh2 f* siyd67cmass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined that the normal force acting from the inc 7ciixd6sq2hfy *,dt+line 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 represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the tor8,3mgg q-e scp of a frictionless 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 the s g3q8csegr, -mlide, what is the magnitude of the normal force from the table on the incline?