07.10: Contact forces are examples of which of mmd z22p1l/uc the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the 4gkex3cfpu 8)rfjir w+9 r(h:others?

  02.20: The graph shows the relationship between the mass op6z2xn+gytw :lh0q j5 f a number of rubber stoppers and their resulting weigh pty2z l xg:nq5j0+w6ht on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, lq)+a)- 9l5q5)aco 1-kg iwu ezkueau labeled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is theq )5lee5-auok ka+zuqw1)ga9cli)u - magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended froq0 h.(*/ t nsfe,qqskwm a classroom ceiling by a series of strings as shown in the figure. Whic0ewsk /fsqh,*.q(n qth string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0( rqmgi:k(el pdh9rh;q+d/:n k。are stationary. The mass M rests on the floor. Which one of the folloemd(pn q lqrrg+( ;i:hh/ 9kd:wing choices represents the tension in the string connecting the masses?

  14.13: Which one of the follow g2n74o3okzol ing scientists is most associated with the following statement: “For szn7lgo 3ko42omall displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, u9v4m cl;tak0- wa-hya force F is exerted at an angle of 4mk y-0ht; uc-9wval a$\theta$. 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 woo,79j n/rij;aj5t01fqg6dc . fp aigjr den box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be tru7f61/ q0jrag5tp9g.ajic dr,;ni j jfe?

  99.08: A weight can be hung i v8yo9dbo+ zdrq6)ie+ n any of the following four ways. In which case is the str 6v 9o8+iddzo+eby r)qing most likely to break?

  96.39: Assume the objects in the following diagrams have ew;* hnu s7rq)vqual mass and the strings holding them in place are identicawvn* )q;hs ur7l. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniforjbm5,:5 rrcxy/l ck) ha mexb)sqo1(2mly. 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 an sc2x5, memo15xq cy)b : klha(rjb/r)y effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the mass w ;j 5pck7ioarhg088ihas 5 p8 ihorjw;agki70 8cposition 2.0 m, velocity 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 pushed to the right on a rough surface by a ho54yjiy9 /l43s swooqqrizontal force of 15 N as shown, during the push, wo4qosy 9y/45jqi ls3the 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 the figure to the riz, e40 w0oiquft (rj4pght is sliding to the right alongto4 f,rp q 0ie0zuj4(w 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 p04 nts-gsmftoh 6gr,o.l-( pplane 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 acr3qxwpv(xrwf , / 3keirij+:y7oss a horizontal steel plate as shown in the diagrry 7iwx3,p j(w+:3reqf /kivx 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 xkf/)a9nd vv6 the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictiovfa/nx9dv) k6nal force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an**oidcqo/ o4y 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 plan2p:/o,bc. msq w 5/ma 1 r:wvn.cgslmme (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 betwe21 / w pmols: /b5,gvsn.c:mm.c arwqmen the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravit ekw;zmm-dlt/b n r)-4gxoi ;ae0m/1sational force 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-axis ikwm erxa /m;-i) d/;slogezm tb 1-n04s 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 ong+vjd upn(m41 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 ad(1+up j gv4mnpplied 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 speedfzrpm51,z np8 of 5.0 m/s straight up a flat surface incl 1pf r5pmz,8nzined $30^{\circ}$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 szthagagh+ca ,+;;t8; wdv) y 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 o8 ;cg v;)aga,t hszhtdway;++n 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 rest at the top + 7tqty 0h nhvc.xs**zof 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 slide7 * q0hvzs*+xtyh.cn t, what is the magnitude of the normal force from the table on the incline?