07.10: Contact forces are examples of which of th kk+d7 ;i fqzo39n3tv g*sk;ene fundamental forces?

  99.02: Which of the following terms is NOT relat;iz c)t4f6yzned conceptually to the others?

  02.20: The graph shows the relationship between the mass of a ff 6,xyaz7o -u+i0 ufpnumber of rubber stoppers and their resuloxuuz f+-fpyi670a,f ting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, lab;u kuri8k du w0mvauj) ub4),-eled 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 isu- dku8,v ;m) a0uwbuu)jri 4k the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by aeyyd 3w );je.y series of strings as shown in the figure. Which s d3;yy).yjewetring has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the p r38u6jv9 .nzx.rp almass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the stpanr9lju6x z. rpv38.ring connecting the masses?

  14.13: Which one of the following scientists is mostw2((j7 3zg(fqug*u+0qrh q*tuhbft t associated with the following statement: “For small3qf(u0g bwgq h+7rqh (tu ttfj(2*u*z displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle ox5.a zivlugdtxp/gk*/ :l8 6nf v :*/lp g/az t 6x5xui8.gkldn$\theta$. 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 bx7p3yi0 yq6sa (otudnccji-hf/2z/ ; ox along a rough horizontal floor at constant speed by means of a force P as shown/ -q3(7 s2;z0njcuyd/i6fyoht api xc to the right. Which of the following must be true?

  99.08: A weight can be hung in anyxi pqgj3nuv9;pr/ )l; of the following four ways. In which case is the strinpxl9 p3)gqirvj/n u; ;g most likely to break?

  96.39: Assume the objects in the following, wv9r4n, ce1lr mtga;lg) w3a ext21i diagrams have equal mass and the strings holding them in place are identical. In which case wo rct;a9,)x4n1geegimva rw2t1, lw3luld the string be most likely to break?

  16.10: A person wishes to accelerate ano*sc9 cece r+,:ldrj; object upward uniformly. Which one of the following choices must be true of the force F, provided by the person on 9rj c:+l *,cdsreeo;cto 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-axis, at one v*biqb0cu+f pzc;1 g2:pkik ff/6/j qinstant of time, the mass has position ;/k gf2pp *:+ikj0 bu/qfc 1qbc6izfv 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 horiz.5k/wyr,i zfvontal force of 15 N as shown, duringrwf v5.,i/zyk the push, the object accelerates 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 is sez adi)x4m* i3liding to the right along the floor. A horizoi ze) *i4xad3mntal 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 ho(4iycg c8tkju/h1cex ,7x- 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 pullz9aqk+* o xup*ed across a horizontal steel plate as shown in ax +pqz**9kou the 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 makes the a.4e4hni a)kqdn2g4p angle θ with the horizontal. Thn a kd i2a.nh4eg4p4)qe 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 block

  01.11: A 5 kg block re0rdhw +ntkaq 95ori9 6b8pf iecd2t hj 1n+0f8sts on 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 pf zh;y3 1uyjbu iw297yht-p5zlaced on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction betwu-w 1zh7uz9 htyjy35 ip fy;2been the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of ma +)s4yfuuf*s )wodomoy * *h4cgnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordinate axes shuymsooc)h*)f o+s d*fw4 4y*u own 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 speed on an inclin1tq(+mkfg ;osed 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 one of the following choices represents correct r(tm+s 1gfkq ;oelationships between

  08.20: A person pushesodffhu7bj60/:y) v b2bplmi zxqh37 : a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclinedh3qf70p7x6 2boh: jl m y bib/)zd:fuv $30^{\circ}$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 me.s34r ; kj2lzwq qzxszr*6)7 q+hwbiisplaced 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 m wz7sh*q6ziklxsj .br4ez;qw)r3+ q2 agnitude 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 )eh0cbwno b5 9gwl09m rest at the top of a frictionless incline. The inclinehas a mass M and mak0n5w9e 9ob0m)bc whlg es an angle 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?