07.10: Contact forces are examples of whin8 c+wax lal*4ch of the fundamental forces?

  99.02: Which of the followinp4r p3 f7ns.mrg terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a 82sqnw-qg(.1 icyb0* vwm zjwnumber of rubber stoppers and their resulting weight on somb2ynsvq*.wm-w 0iz wq jg8 (1ce far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labe+y6ymw/9i.i gpq dtt (led 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 the magnitude of the c6d(q /itp .+gm i9twyyontact force on block C from block B?

  14.04: Three equal masses are suspeupx.j; 2 chbuj(te7 9 )x:tizxnded from a classroom ceiling by a series of strings as shown in the figure. Which string hastupxj ;u7)xhi29(z : xc.tbej the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。ar4jx3 1hqli ig if-(qfc1q:)wqe stationary. The mass M rests on the floor. Which one of t4:-( ix 1cfiqh3liqj qwf1g) qhe following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with 3n/o(*t21jjax tmp 2jc qjv /cthe following statement: “For smt(22 jjcq o ca/j/jx3tvmnp1*all displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the bd:1sn*fo d9wvye68a accompanying figure, a force F is exerted at an angle of *:9e16dowfadybn8s v$\theta$. 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 -bj89lz2uon talong a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be trub9 u t-ljonz82e?

  99.08: A weight can be hung in any offs67gs: rh3g8 ,a anim the following four ways. In which case is the string most likeli ams7:n8fsr 3a,6h ggy to break?

  96.39: Assume the obj*p( f7hwl/g/ u 8:dyihupml6uects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likel u6/ *pdwyipm:hh(ug /u8fl 7ly to break?

  16.10: A person wishes te3 pl:ylk7x .g (7aywltj gm;(o accelerate an object upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the oby:pll gw (7x (;ajkelg3ty7.mject? 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, at one instant of time, the mft.k(w8sj5y s i0r . xrfn:f5bass has position 2.0 m, velocity 3.0 m/s,and acc xfr5f s.w.5 0tjn:kifbr(sy8eleration $4.0\;m/s^{2}$ . 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 ri eap .;zpnmo9.ght on a rough surface by a horizontal force of 15 N as shown, during the push, ape;mz.p. o9nthe 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 rigj( mvhxrmt* gv7., g ;3b-m8iyak +dxyht 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 theva y 7.hymrimk+(*;3d g- 8txx,jvbgm box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane03m hua4ro 3wo 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 shynr4m 4 9nso/ u3tv1gtlm 3op17ain8kown in the diagram344 ntytrio9pus o lm81/angkn37v 1m 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 angl9 vutb*)gz4lte θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional f bvt g4)tzul*9orce of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angvif zqa1eq df155 q9x 9q4:lozle 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 frictty odocq**rk, f2p-i, e:i,vq ion is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frictior*t,cio2 -k *fqy o v:pd,eq,in between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational for gcf3ijuit5zr 59pj ,2ce 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 t25z9j icpt ,5fu rgj3ihe 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. The frm(.q a3ha)cvvndy t,q+-se,v ee body diagram of the object is shown with the gravitational fsdvyq nq3vmhte-va . ),a+(, corce 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/-kr -c xk3d 5ooa+aqn m/s scn5-xod+ar 3-qa o/kktraight 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 wo.05ift o-mj-wml gr:9 y:wy 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 of static friction bigw- 0:o y-ot.wlw5j y:m rf9metween 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 owfw lxwn8n5da++s3s :f a frictionless incline. The inclinehas a mass M and makes an angle θ wit x8+ns+n:3 wfswdawl5h 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?