07.10: Contact forces are examples ore -laucf21ptmf3i2i ax7 m7 4f which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually toqv/ jcop hikt55+5rlgep8(qws4ec( a+ 8k)we the others?

  02.20: The graph shows the relationship between the mass of a number of rubber sx0s f x*k*c8daw/xys: toppers and their resultinx xsxkws a8d0 *c:f*y/g weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labele d;4bhpuj1udx4 x ub)0d A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. Whxdj4dxb)0 u1bph; u4uat is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended fjl5nk- sh3rzt0 at25p rom a classroom ceiling by a series of strings as shown in the figureh5knat zj 2p5t-lr3 0s. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6h (qqqb. +xl.p.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 tensi.ql px. hb(+qqon in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with tbvsox97l 9w.) dmv df.he following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportionl9 o.d fvd7w.mb9)sxval to the displacement.”?

  94.26: As shown in the accompan ahk)cw4jk1n-yev0m5 kq 1m,pbx 9 q3nying figure, a force F is exerted at an angle of q5kk-v 3),n91ban mh kc1xq40pweyjm $\theta$. 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 horizonmfwq g) jk/y(jb0z0 r*4kyl)mtal floor at constant speed by means of a force P as shown to the right. Which of the following must be truj)0r0 l )m* gmzb wqfkyk(y4/je?

  99.08: A weight can be hung in any of the8eq4ow * ljzx w-(goe1 following four ways. In which case is the string4jo l(gx-eqze * 1o8ww most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and h(l5u(xyaef8 the strings holding them in place are identical. In which case would the string be most likey8eahl 5(xfu(ly to break?

  16.10: A person wishes to accelerate an oh2w;c1-am-vp fs0u p8c9 cvcbbject 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 o ucv89p2csfacc 1-;0bvwh-pmf the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one inst8z:kkur)4mik70 ptg 5k.y t dqant of time, the mass has position 2.0 m, 75dkz:ktmp rt 4y8i k)u0k.gqvelocity 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 sf4,vfo7:2 twzw*/prxy xm7 vpushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the objecvr zf4: o7x/w*m,f ypv 72stxwt 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 ty(g;e6vyd u-f:g j hm*he right along the floor. A horizontal fohjum ggvy 6ye(*f;-: drce 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 restsrxxr.b ep -2/r on a 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 act- 6gcnpbj )a3ross a horizontal steel plate as shown in the diagrapj b)g-a3 nc6tm 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 tha0b5q s de hye3sz5-*ebt makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normh*b5syd-eqb0ze 3 e s5al force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle of3v xu sh:xx0z5 $30^{\circ}$ 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 iqb, ev7s 2hq,wvcdh-j;g:8hu s significant) in inclined at the 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 plasg2q:8ed ,vwh-u q , v;j7chbhne?

  08.08: An object on z24qo j*p9-tz+ sj+g vg.vuegan inclined plane has a gravitational force of magnitude N 10 acting on .p4qvj zggzu goe*-jt9s++ v2it 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 inclined surface.

  15.13: An object is being pushed at constant sc/od wg dtoq9i.sq9ji9 (tn(4peed 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 extcg/i(q9 w 9q49ooijsdt (d n.ternal 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 con lb8g z8+ho.tu6 s0tyxstant speed of 5.0 m/s straight up a flgh08.x 8l+b uoyszt6 tat 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 mas i(:0nv(oyzajcdhwg:u)j4, l s misplaced on an inclined 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 t:ijuyl(4a (hzjw:ong 0 dcv), he 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 m) xy:vou y*d;zass M is released from rest at the top 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 magnitud yo )xdyu*zv:;e of the normal force from the table on the incline?