07.10: Contact forces arhu99* wrt8snynna*y .e examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related c8pluh0*i /wg/g sfrr0,tem 5yonceptually to the others?

  02.20: The graph shows the relationship between the mass o a5 tt)9 *9grfx6ftyfgvj(3vqf a number of rubber stoppers and their rqa )tfftvj6r9vg x g5fyt(93*esulting weight 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 at rexhe1wmf4tw c15q ,av-st on a table. The magnitude of the gravitational force on each block is indicated on the figure. What ih,4vx5 1m etaf q-1wcws the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a clasg)uuf/ns k*n z3p589 i, jboo+)lf scksroom ceiling by a series of strings as shown +f*bisup5 j9oclns8noz ,ku )k)gf3 /in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the m+7ege 62r(m:y1gvs ijwqlre3ass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following rq:71(g6w see e3+ vlmrigj2y choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated 1t42mo+bi qanxc.yt/with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displac2nt.y4ci qb 1/xo t+maement.”?

  94.26: As shown in the accompanying figure, a force F is exertejyt(e4jafofh/ biz m:6 b(crwu(7 v7;d at an angle of ehu az r4(j(jy(f: b i6o fwb7m;c7vt/$\theta$. 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 constanto5ygbbh27m0t16 ,5sqy vpf3 kf+ zon dfkb79e speed by means of a force P as shown to the right. Which of the following must be truez+mfh kn50v2 3e9k 1pbb fo,75qtyd7 gob6fsy?

  99.08: A weight can be hung in any of the following four ways. In wich9ivo o.xz,y9,p8 r hich case is the string mostiv,o ir 9,98hcoyp.xz likely to break?

  96.39: Assume the objects lytpg4 ,oqipkn3xxy4 1;0ad / in the following diagrams have equal mass and the strings holding them in place are i3 ndp 4xqax ,igk0t/y;4yl p1odentical. In which case would the string be most likely to break?

  16.10: A person wishes to acceler)dy2h(yce;l- yivd f. ate an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the objecthd (f yd.y-2lyiec) v;? 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-axi4zfkwfh ,2bz3 v1an o kf.kxvkt(z09b5/ea: ds, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accele (/zz w.15kkbkdav9 ,eah3f zfnf2ovx0bk :4tration $4.0\;m/s^{2}$ . 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 k igr3d3ra6zp/go1 +:m 1hb bkhorizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right at+d k m1i:or6/g1k3z bpg3 bhar 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 fig5z5o;b;vxdgo3 uku +q wme(5 uure to the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied;( o3 e5vzbk;5duu5u+wqmogx 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 z-syvm k/ naph)d31;aat 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 pulled acra :k0kq; yzj3t4zrt c+oss a horizontal steel plate as shown in the :r;ty 0t +aczq3k 4zjkdiagram 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 maken9j u(f68shf is the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline on fnjf(h69u is8 the block

  01.11: A 5 kg block rests on a flat plane inclined at a w*nr7 / ..zxdxl4b4no4eh9f5baykqc n 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 (where friction is sign-iwu8 udl ig3kaj)x426 z sa4oificant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frictioku4izga-di)38 2 4sw6lo ax ujn between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational foccz.,sk; )9bdmeki 8omew7 z/rce of magnitude N 10 acting on it from the Ear dsbk.m w;zoi 8k7 )zce/mce,9th. 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 w j6 :/sesz- 3xc(74wkcampgybeing pushed at constant 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 normal force with the surface by n. Which one of the following choices6j- gas 7m4wc x:p(kzes c/3yw represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed 5,;r9uzf 3mjyjb6pb b of 5.0 m/s straight up a flat surface jm3;5 rj,pbz9bb6uyf 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 misplacv n::17 r 4hukixf-wnaed on an inclined plane of angle θ . When released, the block does not move. It is determinevr1w4an xu::inh-f k7 d 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 0.92. 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 o ate84zg )2trrest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontettgza8) o2r4al. 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?