07.10: Contact forces are examples of which of the fundame:eqlksmiq/-pg8w m ;: ntal forces?

  99.02: Which of the following terms is NOT related conceptually to twx:ull e,-sx2)a8y(* qv zp kehe others?

  02.20: The graph shows the relationship between the mass of a number o rt u1sn5sn0(cf rubber stoppers and their resulting weight on some far-off planet. The slope ofs(5tn usnc10 r the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C,/egbtc+nf1r*y ; 6o km remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on blocr+t6nb f*km1 eo ;y/gck C from block B?

  14.04: Three equal mjimx ;ok bb21-asses are suspended from a classroom ceiling by a series of strings as s- obbx;mj1 ki2hown 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.(r h pvfc0t33s-oh1wn0 k。are stationary. The ma sfc -0ov3n1rt(ph 3hwss M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with6i3t, hyi cyus i+:pq5 the following statement: “For small displacements of an object from equilibrium, there is a restoring force that + ti6yypuch5: 3is, iqis proportional to the displacement.”?

  94.26: As shown in the accom5g0h0*j hciiqpanying figure, a force F is exerted at an angle of h0ghic j *qi50$\theta$. 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 y1 u 5ncqunf,*at constant speed by means of ay 5fc,n 1unq*u force 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. In which c ujf43ux9afchzvz ,+)*l brk 3ase is the string j+vc9fhfa3*3xrlk z ub, z)u 4most likely to break?

  96.39: Assume the objects in the followi8lreib s4o)) nng diagrams have equal mass and the strings holding thi8l es)o4 bn)rem in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an objezuf5iz u;g17vct upward uniformly. Which one of the following cho;vz1f 75 uuizgices 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’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, 6(.,*o4jdwcq ty ovo wfu ng67at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,dt,g*6u.oyw(f6o wjq c 7v4noand 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 pushed to tutmt38t ) zwb*he right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniwz3)u8tt* b tmformly 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 slid, 2xqixvq7sb5jx)-cc ing to the right along the floor. A horizontal force of 10.0 N is being-x c)ji2b xcx7v, s5qq 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 ojv p ,f8,2.mbljyn/p yn 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 across a horizontal steel plate as shown inkm ,ga;e1b .cu the diu;k, b 1a.gmceagram 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 tvzxkfh9ca.th1y4dm8 n 5j-5 zy+ye7 i he horizontal. The block r c xvfah1iy z z4-+kt598m hd.5yyj7neemains at 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 inclined at an angle ow19vyg -x gcq(f $30^{\circ}$ 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 plab;dcc dk 3 opfg j(d6mo0 c;yk8b++ci.ne (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 thdok(i;0bfd b.c8kmdc gcj6 op+y3 c +;e block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitudzvrsj(96cy4,(mxnvi 6er) w ae N 10 acting on it from the Earth. Which ofznx()wrevi,y6 j(4mr c a v69s 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 speed on an inclined plane. Thefx)lqi,6wbi bo.10md ;htvmo 6 y7 h(h 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 ymq ovt;(h66bmb,o)hxf.7d1l i0hi w of the following choices represents correct relationships between

  08.20: A person pushesc)/ 1nh 1- vzmd+uwfixg9bj z2 a block of mass M=6.0 kg with a constant speed of 5.0 m/s straighxg19 ch/vm 1z+ufw-z2dijnb )t 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 inclined plane of angleenmc:z1 fz /z)8npbd5 θ . When released, the block does not move. It is determined that mzz/p b1fzdcn8 :e5 )nthe 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 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 rjy7/2dprth ;ojewd+,est at the top of a frictionless inco;p2h dwy7j, jde/+rtline. 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 the incline?