07.10: Contact forces are examples of which of the fundameatgk(/gviq v:b;nu ut. hv4,*ntal forces?

  99.02: Which of the following terms is NOT related conceptuallywh *5ud:gh 8rx to the others?

  02.20: The graph shows the relationship between the mass of a nu+6rm2o7j. eqqah-hz r mber of rubber stoppers and their resulting weight on some far-off planet. Th +2 m-qorrzq.h6a7hjee slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest o3d 0/h 9nhyauxn 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 fd 0hy3h9 nxua/rom block B?

  14.04: Three equal masses are suspended from 6 hiiznxo2/c.hms7css0nw1 /a classroom ceiling by a series of stn nh10i xs7i/.c2ssz/6 omwhcrings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0r ahnve,)l ;ppwz9/ .l k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices a; zl9n.p)rhw l/e,pvrepresents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the foll m:n8b:) crjldowi:l8r jbdm :nc)ng statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in t/,yf9oxj5lz 0/7 )rghhwn tbthe accompanying figure, a force F is exerted at an angle of rt, x7t fynzb0 l )hwo9/g5j/h$\theta$. 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 rough horizontal floor at cuz24lf zvn),wonstant speed by means of a force P as shown to the right. Which of the following must f w ,uzv2)zl4nbe true?

  99.08: A weight can be hung in any of the following four wayyyd5jn;.g01a1m brg us. In which case is the string most likely to0dmngb j5u. y a;y11rg break?

  96.39: Assume the obxhzg7x5w48yj9 ukj pf-ig rm, (ub88ljects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most lik8p bumiw 87 j (gzxjlk9-5xgrf4 yu8,hely to break?

  16.10: A person wishes to accelerate an object u,*ntaw+ g*g jdi26mstj(v 5 cijq9rh4pward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W repre ,ivdarinhw * c9 2*s4jgjttgm q5(+6jsents 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-axis, at one instant of time, the mas6fvh v h 7* b/1tbwt8eam/sfa,s has position 2.0 m, velocityhv b8wt6h, t fbf/ae1sa7v* /m 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 horizopv(jl06ruq;9w vtz;r . jfol7,v 4ozsntal force of 15 N as shown, during the push, the object accelerates uniformly to the right at 2.5 ;s,lvjvp oju.7ort(9 r6fwvz0 ;qlz 4 $m/s^{2}$ . 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 is sliding to the righto,tmy3w;igts a+f g(: along the floor. 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 bw;(ys gt+amtg3f: io,ox is moving with:

  00.32: A block rests on a flat plane inclined ate vs0pi/igr92 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 firso;7yd;wb u0ah9gxe .at81f )b-ieb npt pulled across a horizontal steel plate as shown in the diagrawh;pa0g 1 .uib ntb f-y9)eea;bod x78m 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 wxy-x0jl4-0r,u:l+onv jls i n. ug )eaith the horizontal. The block remains at rul+gyj4l -jna-).s0vxelouxr: , ni 0est as θ is slowly 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 (gs+ h68 fduaxba;pjb*ubb;(mgy 0a)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 signifi3 - nb;wka.s:w.nd ) +tluiinucant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block tua.i):-;lb snw n3+u nwd.kiand the second inclined plane?

  08.08: An object on an inclined plane has a gravitatizq **yf j4-cvtonal force of magnitude 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 perpendicular to the incline’s surface qj-zf 4*tcv* ywhile the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined pwd- /eqk, qrl* .(bydw fg2yp7lane. The free body diagram of the object is showne gqylydpw7rf2 */-.wb,k q(d 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 witj /:ss1dm66huh1nez za k8; krh a constant speed of 5.0 m/s straight up a flaz eknhrs;s k:z/ad u1m 1h86j6t 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 on an inclined pla gtxu3wx(jo,m,c8 3qhne 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 0.92qm cg, th(xoj33u, 8xw. 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 re/km8yg2/9p bfa0dm .1d- f wak:b3ic8h kv ptast at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remainky:2w8m ga t/a f/bdf8p1dk. 3 icvk9-a0 phbms 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?