07.10: Contact forces are examples+ys 2iorv 9b +ke-qil166zlu a of which of the fundamental forces?

  99.02: Which of the following terms is NOT related concerwl;+ kmc7.i fptually to the others?

  02.20: The graph shows the relationship between the mass of a k7s;x(jtz3g4gx ioy,)1oru c number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is aj x1y)t (3,og srkouixc4 gz7; representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest xg9wd1 4 g fu4oxb8a5qon a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the cont849fguo1x b x4qdwag 5act force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling bm-0z8qj2yf +s zp1 bomy a series of s0+m myoz sp28bqz-f1jtrings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 9h: lqo1k oxnl370mpy 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of thln09y o:q3o l1 hpmx7ke following choices represents the tension in the string connecting the masses?

  14.13: Which one of the follov, 4muy(b; ib f8cm7d2km pq4twing scientists is most associated with the following statement: “For small dispvyum 2(tbc,;d qkmif484b7 p mlacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompany71:al6eh 6xfeob mm5 h h,6dtzing figure, a force F is exerted at an angle of hh 6l: 6eemf1 6daho 57bmz,tx$\theta$. 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*p ha*gn3l9:bk cg ym9m k-.da +5vfhk constant speed by means of a h 9dk -.g+kfn achy5bkmva3*lp:m*g 9force 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. nn ojte*k-. c r/)kd8xp lcd()In which case is the s )dnr)pj(dkc-e.tkx l/co8n *tring most likely to break?

  96.39: Assume the objects in the following diagra9qai) kn9( qp+vo)(13smpttv) uhm f vms have equal mass and the strings holding them in pohvm(qfivt)k3p)mnv+9q9 su p)(1at lace are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one qx19iij 2x6;yk5 oo (mkhon4atqd),k dko*)wof 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 an;jox)n*tkwk5 )ho,q q yi1k62dadx4 (ooki m9y effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the n91p 0krayxfxbi,( h 7x-axis, at one instant of time, the mass has posxxkrf1,pa h(n7 y0 b9iition 2.0 m, velocity 3.0 m/s,and acceleration $4.0m/s^2$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is 5pbl6o*l 92r g:kzuou pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the right at 2.bu* 6lru o:ok 52p9gzl5 $m/s^2$ . 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-( *p)v5 no8 l7mgla,c.wyo sdg pfd-h the figure to the right is sliding to the right d-( llwo*osv5ygg7df,m- .pnhap 8c)along the floor. A horizontal 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 plane inclined at an angle1rudd 9 1ivb/l 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 .(ns jbdl;t7ir 6u t x+qop-n +wa+ur32i7udqhorizontal steel plate as shown in the diagram Aa. qst +6d7rowr2b j+d+3p-;nx 7 ni iuulutq(.
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 horiz 23uo3mb1efmhontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and them1h2f3 m ueb3o static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at -7)*bs:aq+pd9xui ge najf:l lmk80san 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 fric 7c w b3 k4b72s7t4gj6lyifrohtion is significant) in inclined at the same angle, it wil73bt4 h7lg 7rw42j i y6obcskfl 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 4);+ bgdw vegtforce 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-axeg;gwd+4 b) tvis is perpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being:u8b6n y w*opm 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 :p 8wnoym*6 ubchoices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a coh+kswn4j* w 0dnstant speed of 5.0 m/s straight n sd*j ww40h+kup a flat surface 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 inclined plane of angle/qs0yj: /b 9ij(hsib e 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 betweeijqs9j bhyi :b//0se(n 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 r(izb (8h,c0-yd aa nhtop of a 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 magnitud0 h8adrn z,i -y(bc(hae of the normal force from the table on the incline?