07.10: Contact forces are examples of which of the j,nd7s-z6g zcgpo: nn .,gxg0fundamental forces?

  99.02: Which of the following terms is NOT related conceptually t j f8uy; +,vz*5aq,drv scg;keo the others?

  02.20: The graph shows the relationship between the mass of p.2 5ccmf,yfc a number of rubber stoppers and their resulting weight5yf 2cmp,c.fc 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 b oekg ez *0vm57lid29at rest on a table. The magnitude of the gravitational force on each block is indicated on 2z50*7klo 9bedgimvethe figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspendeacn k3.il8dy- d from a classroom ceiling by a series of string n.il 8-a3ycdks as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, t4g1st/f or o,he:1l w hp.uu/mmv2 s,rhe mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents thehl sr1 ,rmg1 :4uswvfhu pmt/ .2oeo,/ tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with n1eu0(feqpa 6pgybej ry 0-;;the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the d0y;6p(qgn r ;jfep 0aebu-ye 1isplacement.”?

  94.26: As shown in the accom)dul2c;b n4)sslu v 3vdp 7bg9/1w olzpanying figure, a force F is exerted at an angle of 1;u)9zdgo/l nsv pc) 72l su 3bbvwdl4$\theta$. 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 puli-nc ugx,w8yc6btd2 - ls a wooden box along a rough horizontal floor at constant speed by mea c t2,bw-ncuigdy x8-6ns of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. b bw x.9n.q yrl5,7ouv6.caanIn which case is the string most likely to breakn6.o 57 vl. qbcnxu.rbaw,ya9 ?

  96.39: Assume the objects in the following+0/cigxrww:9 b ,teen diagrams have equal mass and the strings holding them in place are ident:c,w/xbrne+e0 t9i w gical. In which case would the string be most likely to break?

  16.10: A person wishes to accelera-c-sg .f9h- hrtc2inq te an object upward uniformly. Which one of the following choices must be true of ttqhs-n f.-r2 c- hg9cihe 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 ygvh/7qibi:( moves along the x-axis, at one instant of time, the mass has position 2.0v hi:yi(qb g/7 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 149.9h tocr; ;.qqqxm gb ov0alq7hqba rough surface by a horizontal force 4hq.xrq;aq ot 19 qo7 lc.;bm9q0vbh g of 15 N as shown, during 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 i6xr :i p9j7e6a,od2ehjl5ntns sliding to the right along the floor. A hj t7ndjne6i: 9olh pxar5e2,6orizontal 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 a flat planid-3 p va yazghp;sz*2 pg5 h3of4x;x/e 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.e *ywwggw;3tu+ ht-f pulled across a horizontal steel plate as shown in tt3w fwgwyhg .eu;-+ *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 angle θ with the x:g.w osrx .izn 8 5-a+jibjw1horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional for-wjo.:w x5bir ixas.8g 1 zjn+ce of the incline on the block

  01.11: A 5 kg block rests on a f4 d-mswa uvj3ozr;ax+:- -kfulat 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 second plane (whe8il f 3/hhgqf;it7/ev re friction is significant) in inclined at the samf vhgi 8/fi tehq37l/;e angle, it will 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 inclinta-k . 6mlhuuj -csj-;ed plane has a gravitational force of magnitude N 10 acting on it hkujt s6;.lu-mcj-a-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 while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speedg91d1imkei 1j on an inclined plane. The free body diagram of the object is sho1j1 mi1de9i gkwn 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/bn mc jz8i edgcr)d6 2n/8m*d1xfz/ d mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclind*zg/) z/b6cxdr/ jddf82mnc1 n 8eimed $30^{\circ}$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 ok+l.;7nub n,4boi uwn f 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 ;ionnl wnku,b+74.ub 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 frirgptxq7hc( / (ctionless incline. The inclinehas a mass M and makes an angle θ with tht(/ p7h(rcqg xe 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?