07.10: Contact forces are exame)+gh1bn0 2sujh 3v8l+y(armbv . r ihples of which of the fundamental forces?

  99.02: Which of the following terms is NOT rys:4q p4lev-:s0pc x4edrh q9elated conceptually to the others?

  02.20: The graph shows the relationship between the mass of a n8ik 3 bioelvqxw*,m 9-1 lig4number of rubber stoppers and their resulting weight on some far-off planet. i 8lk-x, li go14qvembni* 93wThe slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, ju 4uaonm)+9gijb++ q sum;* eg ky/j7and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated *muq aku7jj eg+++ uo/js9ngb;y)mi 4 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 series-k h7y xud(ai7k1tv9oz62acu of strings as shown in the figure. Which string ku duiv6az ky(9t7hc-a1xo7 2has the greatest tension?

  16.05: In the figure shown, th wwq2sr0wm t8+e 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 the tension in the strsq 0w2+8mw wtring connecting the masses?

  14.13: Which one of the following scientists is most associated wi1ltiu3ey/ hd c3i (/ix5k( ikzth the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacemkciii / (133ziu5l kdxeh y(/tent.”?

  94.26: As shown in the accompanying figure, a force F4b/wl6xib vx- is exerted at an angle of /4-xlvi6wbbx$\theta$. 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 horizoqupv8 flavix z50e1jjg(s7kf,u/ l,4 ntal floor at constant speed by means0u v7jev, 4x(8g5i pauqzjkf l1 lf,/s of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can u-md2j4l,jx214m ryv) bs10 e wydwucbe hung in any of the following four ways. In which case is the4dwuluv)e1srj-b0, 2y x41 mmjdc2w y string most likely to break?

  96.39: Assume the objects in the following diag1*rv jz9as yv c,a-3qprams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to br39s-* zvpq,ajcr a1yv eak?

  16.10: A person wishes to acceleratdhz1g5 z ot0z.l6(gvo,ahh(i e an object upward 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 air or of the hg hzl v51.,zah0to(gz( 6idoEarth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of tim4i y.s3h n.u.bww ach+e, the mass has position 2.0 m, veloc+cb4u .3wh.isahy. wnity 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 sus 4abrlz-z; 5sul2j 6arface by a horizontal force of 15 N as shown, during the push, the object z2 -jl4alsbr;zasu56accelerates 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 8f d wu 15pw(7ejis5ngthe right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kup7 i f5jn (d158gweswinetic friction between the box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat pljb)/gm+nqzn w /rep e 57te3njh4y7w9 ane 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 pulledf*k 6c7 3n7pzima4gn6j q)tqu across a horizontal steel plate as shown in the diagq) g37tqinn c u mjz676apk*4fram 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 *l* j ljvirqw6 ;t/.;l2tf cq.jh0 jfumakes the angle θ with the horizontal. Ttfjlllh jf;j /*.*26rwt.v qci;q0j uhe 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 rests on a flat plan-mp6y5mwly wt: :5lkqe 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 plajca7l p +)h1wnne (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s.pl1 hwcn+7 aj) 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 f/)(f-l f*ozv u;sppjyi xk-z+n x(7n norce 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 perpennnk;(l-+ p-fj pzsyf (o7)z*xxi n uv/dicular 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 inclinerid a7gs 3re) auu97,ld plane. The free body diagram of the object iss r7a39, ldaig7u )eru 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 5.0 mz,b m-y/k (aak/s straight up a flat surface inclinedkbza-(k ,y am/ $30^{\circ}$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 osb5hw7vk(1e jd5 ncqe 7v5 3jqf 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. Thhc 7(jqd5 1qvej3 b7vk ne5w5se 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 top of d;h:;p;,ypap3 bs nxu ca48 lma 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 slide, what is the magnitu;; sybpax;8 a3cdh4 :p mplun,de of the normal force from the table on the incline?