07.10: Contact forces a9jelp9aitauhk.9,/sw9o*g f re examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually 6i9sz- 6cxj 3fgs8p eoto the others?

  02.20: The graph shows the rw h) /0rlin6dxelationship between the mass of a number of rubber stoppers and their resulting wei/xd)0w 6ilhnrght on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and Cdd :l7hei 7 bw+llt/9t8 ;mp)peibmo ,, remain at rest on a table. The magnitude of the gra7 )bl o e/;p7m ei+:d di,hw98ltbltpmvitational force on each block is indicated 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 sz zt*ng/0zt-kj/s tl/eries of strings as shown in the figure. ztnkj 0 g tz///*t-lzsWhich string has the greatest tension?

  16.05: In the figure shown, thx c /buyn1h6xi27qo 9ue mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floo 7nu2cixux 9bho61y/ qr. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of t u+f ruw7zi34jhe following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the d3j z+rwuu 74ifisplacement.”?

  94.26: As shown in the accompanying i/,dd xjqrut75v td iki89a-9figure, a force F is exerted at an angle of datit9x7iq-8/jddv,9 5rk ui$\theta$. 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 pul 0-hqobcf:*9qqx hvjs uri (19ls a wooden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the followih:q fqv*c q0-1 uisrjx9o 9b(hng must be true?

  99.08: A weight can be hung in any of the f:rx uz5h*cs9lollowing four ways. In which case is the string most likely to bru*zrc lh9s:x5 eak?

  96.39: Assume the objects in the follow zox h(9 :d2nxlatxv,*ing diagrams have equal mass and the strings holding th9hn *tx,2a:z(xv xlodem in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upwardl.a1fjoo9bx .po 6pn. 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 acting9b.6o .xop1 alpfno j. 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-ae v7cied/lgb( y y(i10xis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and ac/g07v ei ecdy((bil1yceleration $4.0\;m/s^{2}$ . 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 bsig3dusim/ n0:epu3id5t9*ey a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to the righs sen3/i0: 95eui ium gtpd*d3t 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 wfdj.r , e19xw-u(jnsfigure to the 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 kinetic friction between the box and the floor is 0.20. The bo(9ewjs.j1 wxnrf -,dux is moving with:

  00.32: A block rests on a flat plane r riki k/n jpp,+z4,lk)5w 8v0iy6)jnd v8 wboinclined 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 horizontal steel platy-sbw( 47px:ky 0x):5sg kar2 8wi;z oyifavbe as shown in the diagr 4p yoxyb57kzf:sak- 8vx)ii2 ( r:ygaw;bs0w am 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 y u q 97a/oggzpl1*b/cxbs 4,i θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the sta9 as gbp4 7c1/izbxlgo/*uy,qtic frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an anv fext/oqh).d e92c* ngle 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 signific + x2qrjmi)7wgant) in inclined at th+r7qm g ixj)w2e same 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 forgd t1b3h/ -mra/6w bwjce of magnitude N 10 acting on it from the Earth. Which of the following gives the correct component-wwdamrg6b1 3b/j th/s 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 constant7qeg *zv:6 qc ev82ofp* f8lub3wmbf( speed on an inclined plane. The free body diagram of the object is shown with the g qb8c8mfqvelop3v6fefgw2b(z :7* u*ravitational 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 wdw9m(+v6h2 utqrb:mmzt 0 h 5s sruazz;v:70 m/s straightq5m(m9z;z 62h muwu70b wrtszvvthsr+:a 0d : up 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 iuxts( fy6js q9:;c/.okua(g znclined 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 the force of static friction acting on the block has a magnitude of 38 N. The coefficient ofqa.xtz6f 9/c (yu:g ss j(uk;o 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 fw+*qjur32xz hw p+ 4o4co/qudrictionless 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 magnitude of the normal force from the table on rwdw +3h2xz+o*p4/j 4qou c quthe incline?