07.10: Contact forces are examples of which of the funda sgvq+e/ lwy,j. 1xo8mmental forces?

  99.02: Which of the following terms is NOT related conceptually to32/-fb sgp e/qhp t9 btbaps7- the others?

  02.20: The graph shows the relationship b6b//v4ouj(0h 1ml t oqqpqe p5etween the mass of a number of rubber stoppers and their resulting weight on some far-ehloqmpqp b50(6qu/ /j1t o4 voff planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on ac0 3nycez, o t,mzu.c :s7y9zn table. The magnitude mn,uc.o :3z0et, c7snyzc9yzof the gravitational 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 masse 5pepp sad:nb.ei-s1: s are suspended from a classroom ceiling by a series of strings as shown in thei e -s5nbed:ppp.s1 a: 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。ars3s25w /tpq(d7xshoq7 fl zdu-a8( xwe stationary. The mass M rests on the floor. Which2 tq(saxsl5d8wo 3q( 7pf7dh/wzu -sx one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientis(h9frm 1 uc .nbnb/tz(ts is most associated with the following statement: “For small displacements of an object from equilibrium, there is nthn1u.c(bbz/m ( 9fr a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanyi qayo56-c 53,xbd)rz0auxi wzng figure, a force F is exerted at an angle of b)5y50id6uzzrx a x,w 3-aqoc$\theta$. 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 cons w)8bj r5p xj dmwrif,+s0-l0dtant speed by means of a force P as shown to the right. Which b0 5)0dj rp, xid+r8 wflsjmw-of the following must be true?

  99.08: A weight can be hung in anr( x4+e +qeqqa0:rvb cy of the following four ways. In which case is the string most likely to break?er 0:(e4 qrcb+aqq +xv

  96.39: Assume the objects in the followinp;*qz)xvj(sr) ebg.)y 2rgsw g diagrams have equal mass and the strings holding)j )q2;psxb.g)ewsvyr r (g*z them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifexl:2 rj2b* e8qrg p-lormly. 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 gravitati lxr j82r2-bg*eq ep:lonal 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-axis, at onhm /ib6 +/6nvod (s )ca2vmddee instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and acceleration / nsi m6de)dd vbca/+o2m (v6h$4.0\;m/s^{2}$ . 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 a3fjiywiv.ek +*ujnff sf9 a9-(k hxl-bl43( z rough surface by a horizontal force of 15 N asxalb flf3f( ik9 v+u*-kwes9j.yz-34fi j(n h shown, during the 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 t*xzszj :ebva-jx se+ od1 m.0igri 87-he figure to the right is sliding to the right along +g*xz s : i-xi8jzbajs rdem-70v1oe.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 pladgag +9nbib.q5 y:hq, ne 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 horizontal steelse5,e4h. k1wx p0pttg plate as shown in the diagram t p.p0 e s4xgh,kt1w5eA.
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 8wx mr.ukuywc lgf4j v*/l m4 p5 788lj9diz+sthe angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictio d7spw88w u4i g rjl*j.y+lx5 9uzfm8kc/v l4mnal force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclinedc 1+krc kx-ta z/1po;p 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 aw+f71k v6jmodeu) qawlpok */89: h bh second plane (where friction is 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 ow wjqdk6ealo m hv7/ k+:1bh*u8f9) pblock and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force o)0ogf*f6o*mgd a ia,p d)-pahv5 ynm+go0e8 e f 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-axis is perpendicular to the incline’s surface while the x-axis is paraav5nh- f8 +0m egf o0magdd**iayeoo)6 p),pg llel to the inclined surface.

  15.13: An object is being pushed at constant 8hmarb9 p 6-htspeed 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 968aht p rmbh-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 const17fuxqbg s,- bant speed of 5.0 m/s strai-usq7 x1gbbf ,ght 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 bloc*g0:k7/ 0;m +mlkn rrdy hntwwk of mass 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 themt n+y;/*0: wlm krhd grnk0w7 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 ac0eell6r0xfy(jx+n,a d-zd .px 0p (+lxp+ jy frictionless incline. The inclinehas ad,np-le(6x0 +ypraxyz. (le +jjc xd l00+fpx 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 the incline?