07.10: Contact forces;3d ;qgvj6nw. 3ycuf g are examples of which of the fundamental forces?

  99.02: Which of the . 1tsir,)hnu3m uayf ;following terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of h-opr7nkan3z i:8kp :rubber stop :o 7-k8rkpa3hzp n:inpers and their resulting weight on some far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a s -f/06wyq5 vmp.lilrtable. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from bloc/fmvq 0.llrs iw5-p 6yk B?

  14.04: Three equal masses gparr /heg;q84sd5 /jare suspended from a classroom ceiling by a series of strd/ g q5/;jgrraeh8sp4 ings as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。a.4nq7xrhs hec-pl*hrq *:t : gnd the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting th *t7nc:rx.h*l s rhpe-ghq: q4e masses?

  14.13: Which one of the following scientists is most associat by* 6q5r(b9 eqeoyn;bed with the following statement: “For smalnyo(*e rqe5b 96b; byql displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accor4 q:1s a 6fge,7 9j9deqmoefqmpanying figure, a force F is exerted at an angle of jq71s:4foe gem69r d,aq9q fe$\theta$. 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 bohmgt rxm k+2t1vzrn (,;47itmx along a rough horizontal floor at constant speed by means of4(z 7;m h+trtrt1 v,nxik2mg m a 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. In7528iwybp37 h u sisjb which case is the string mopyi su72bh i87ws3 j5bst likely to break?

  96.39: Assume the objem; ,zsz46imbk5vi2ps cts in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string bepmzisv 625 ;4misz,bk most likely to break?

  16.10: A person wishes to accelerate an object ,4v op ycsspz-v d+heix;irl+1* bz+3 upward uniformly. Which one of the following choices must be true of the force F, provided by the person onto the object? W represents thexz -pc vr viy sl,+oebz++;psi*d341h 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,fdrr,u - 0wnlw:m0m9u b/piq6c7xr5y at one instant of time, the mass has positmd0fxcr n-65:q y07r u ,lbp9imwuwr/ ion 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 ty8vf-9 11lgu qxdxww6ha 4my :o the right on a rough surface by a horizontal force xhm 4:x-w dyugyl1f186 w9v qa of 15 N as 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 in6dpw98nf u4wn the figure to the right 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 the box and the floo9wuf64pdw nn8r is 0.20. The box is moving with:

  00.32: A block rests on a (x tow4v eq*x/kxe50mny,5t ,a xn*y /e(zzlaflat 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 isev*t0:v f ue-;.p 1w 8bbfrhuv first pulled across a horizontal steel plate as shown in the diagv0-vu :bu*pbf8ferv eht1; .wram 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 ine;gq: w4-s,fpw 1j xzjcline that makes 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 frictional force of the incline on the bloj4wp fz,jg: xs-1q ;ewck

  01.11: A 5 kg block rests on a flat plane inclined at anspc3wtp//h /s tjpt9* 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 placp 7xzzpc) :c xr;1ym9bed on a 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 betwee:7cr19; )yb xzxmcppzn the block and the second inclined plane?

  08.08: An object on an inclined plane has :s-yegd+u7mj g8;pmea(8 zgua gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gra-gmg muzu;g+j d:yeapes( 8 78vitational 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 cons:iuvm )a-qoc(98ennsgx6 s -gtant speed 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 F, and the normal force with the surface by n. Which one of the following chv-8se og(6) xu9s:g nmnciq-a oices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of 5k-*j*r q2oxzs .0 m/s straight up a flat surface incrz*qs *2kj-xo lined $30^{\circ}$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 amqvnk e4 l pey+;n ah,c,,+e:wn 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 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;np:+e,4a mhywncq l, vk,ee+ the mass,m, of the block?

  17.40: A small object of mass M is relea xi1+;rtgztz c1q bo3hjf5w:+sed from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The i ;z1t++cjx o1htg5:biwfqrz 3ncline 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?