07.10: Contact forces are examples of whimw28 t6,yu8djkq 0a f:96vztwhx fxe9ch of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to thbzezt8w:nvnqd* a 28rv3nx( nmu ( c73e others?

  02.20: The graph shows the relationship between the mass of a number of rubberu,.e z4btl udt q4m m.3l1u9ei stoppers and their resulting weight on some far-off planet. The slope of the graph is a reutd.4,l mml.qb4uzetui e9 13presentation of the:

  10.15: Three blocks, labeled A,Bymh *g:h6do 9b/z0g(fet 6nna , 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 contact force on block C f (ynaofh9g :z6d0gbe6 m/thn *rom block B?

  14.04: Three equal masses are suspended from a classroom ceiling by a series of qgk7k rx.ba5 9strings as shown in the figure. Which string has the greategkq.9 b7krx5ast tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are 3 hq(-7)q ar/k)ho dcpm,8+b hiyiu :k0zx zihstationary. The mass M rests on the floor. Which one of the following choic)bqh uiy-i +p,z 0h z:k/d(om iakr7)h3hcqx8es represents the tension in the string connecting the masses?

  14.13: Which one of * t-r20;caj 6omwed pqthe following scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is pro0e d2cw p*;-ao6mj tqrportional to the displacement.”?

  94.26: As shown in the accompa: ;;cwu9fs i 0c) doa8*sfq. inbdig2kg00aa rnying figure, a force F is exerted at an angle of c)dif2 o;s q0bgsd*0r.na;uiwf g: 90i8 aa kc$\theta$. 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 9p) *bs zybbnjg+0yx9a wooden 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 bsnp*)909gyjb+xb b yze true?

  99.08: A weight can o pj( 7k(icry;:akb*mbe hung in any of the following four ways. In which case is th m(pcry*o(;7kkib: jae string most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the st2d u .;5tvozncrings holding them in place are identical. In whiccud.5z2;v no th case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Whicznf 7; ly3imwp/.m+7ngk vz h7bs:ah 2h 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 any effecty /azp:gm7f+;n inzw.37l 2sbhkvm 7h s of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant +w2ml kf2hlb35 r7xev of time, the mass has position 2.0 m, velocity 3.0 m/mbw5xh+7rv ll k32fe 2s,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 pu0ys bbx6eth1ue s5)5 qshed to the right on a rough surface by a horizontal force e 5b1h tsse)u50 qb6yxof 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 in the figure to the right is slq 4zh qx7si k4iy9leo/6po q(,iding to the right aloo, zy7hxl9pqs 6 4oe iq4q(ki/ng 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 plane inpbim4m i k7/ /+hklp ,6bsxs:eclined 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 cuseh:xvqb s) 89zw-,as shown in the8z :9cbh,xues )swqv - diagram 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 restsv(li-h4bfef 2iu1g+ sny vpi(1u(- tz on an incline that makes the angle θ with the horizontal. The block remb(f14 v uyen-2h (vg(usiiif zt+1 -lpains 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 inclin9rc/d alebh p5magg u03e9u/0ed 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 a second plane (where friction is signifdr5n-cznv 44e1xn 1j picant) in inclined at the same angle, it will begin to accelerate at 2.cj ne5 44pvx1dr 1znn-0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an in o8 eme:b-cudzy,d ,+fclined plane has a gravitational 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 is perpendicular to the incline’s surface while the x-axis:oc -z,edbm,f e du8+y is parallel to the inclined surface.

  15.13: An object is being pushed at consjlwr2wf7*6k i tant speed on an inclined plane. The free body diagram of the object is shown with the gravitatiol 62ifrww*j7 knal 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 choices represents correct relationships between

  08.20: A person pushes a block of mass M=6j. + rnktvv rjk.sy1t)lj/: f8.0 kg with a constant speed of 5.0 m/s straight up a flat surface inc rrj:f .t.)skk 8/1j+jv tvlynlined $30^{\circ}$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)e+oxu kms)0 t(fvmg 3 misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined the uog(f)tsvxm3 mk)0+at 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 the mass,m, of the block?

  17.40: A small object of mass M is released from rest at the top3.x pau(f9w8 lwnij3s of 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 slide, what is the magnitude of the normal force frnjwl83 wp.x 9s(if 3auom the table on the incline?