07.10: Contact forces are examples of which of the fundamentalb4da q 4a)1sgd forces?

  99.02: Which of the following terms is NOT related conceptually to the otherzu 8sdy6ltn7a 5xd 5o,oi2 5wstmrv62s?

  02.20: The graph shows the rela jqu jj.ij)30ctionship between the mass of a number of rubber stoppers and their resulting weight on scuj3j)ji0q j. ome far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table.tsq9 ;ao3a cr*ua)qp x*xw36k The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude ofwa3kq*t;q3r oa 6ax c u*px)s9 the contact force on block C from block B?

  14.04: Three equal masses are su.v t)z)g;n ,, vnc)y6sparcwf spended from a classroom ceiling by a series of strings w.,v)6a, n)tczp)v;yfncsg ras shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。aran9yl 9 y-:3chnvvz2pe stationary. The mass M rests on the floor. Wh-cv9:2a hv9lznn 3py yich one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists hgd0/ qe7*dyh is most associated with the following statemedeh 0yq7*/gh dnt: “For small 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 *guft,dnqlm,sfqv1 6 /k0w; h w1:wlw sq8r7c F is exerted at an angle of mcf/r:0wqw; g*uvs,qfq k1wd7 8w1l6nt, l hs $\theta$. 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 const8a doajie .6 l(2x*eyso(dv c(ant speed by (d(cxl. ao*eevos idj8(26y a means 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 ar9;:j 5 x:mapgxqmvu7fi8 9v vt7+ ibof the following four ways. In which case is the string mostbgp ax:mj 5v ta;iqi9f9 v8xm7r7u:+v likely to break?

  96.39: Assume the objects in the following diagrsjgh)4l4 :hfsams have equal mass and the strings holding them in place ares4 h:s 4gfljh) identical. In which case would the string be most likely to break?

  16.10: A person wishes to ab.-mjr(v+ e c buxcr;1ccelerate 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 Earth r+-ju(br e.b1ccx; mv’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one insgi (9 c+lkd t-m+ hl:gcuf,a8btant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleratgbl9l +df,ccmk(ugai+ -t8 h:ion $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is b8h4dq(h bpo)d bd7z.pushed to the right on a rough surface by a horizontal force of 15 N as shown, during th(b b d.zpqo4 h)8db7hde 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 sliding to the rig nxv9;)u7i od wzdhjb8b+ (0zeht along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the b9eb( vonid7bdw;j+x h 8zuz0 )ox and the floor is 0.20. The box is moving with:

  00.32: A block rests on 3m 2/28idpy0 kveuo;w4xbld1sgh l.za 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 pulled across a h xyqm8ma f,pr+88cr: rorizontal steel plate as shown in the diagra,8+: m rpm88qxfcr ayrm 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 ho 4ap5wddev7x hrc566;(u bmefrizontal. The block remains at5r 6u5 ;bdaedwe fmh6x(v7 c4p 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 plane ix9a/hjcne1 tl c15 kc 2ac; wnv).u:ypnclined 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 (where friction is significant)y 4vrwl*)e11qong a0o in inclined at the rl01vy 1 )aego*w no4qsame 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 inclined plane has a gravitational force of magnined q)i;ae9a( tude 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 while the x-axis is parallel to the i)ni edaqe;(a9nclined surface.

  15.13: An object is being pushed at constan a-t /d1b lbf,3q06q,omkkkrut 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 suf,t,6adrukq kb1-3l /kmqob 0rface by n. Which one of the following choices represents correct relationships between

  08.20: A person pushesg4mr06t:ld c .jdq /eq9 hl*bs a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat l q:94*0d bc/qldg.ejrmt h6 ssurface 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 incsa u3cg 1(b(7rhbe bcy 2q3*dxwry x*-lined 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 magnitude of 62 N while y2a*b(3 hcq byx *uw17r bdrsxe3( cg-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 rest at the top of a friqw:-,vw9q jmrctionless incline. The inclinehas a mass M w9 mwrqv,q-j: 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 magnitude of the normal force from the table on the incline?