07.10: Contact forces are examples of which of the fundamentaly3mu2m 2rx y2 0mh,gdw forces?

  99.02: Which of the following terms is NOT related g4o5n/+;x/h4esxv0x omb e cl-bjoe2 conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of ra45w;vzefq81bm tyvo a zx* z6 ;hi.6fubber stoppers and their resulting weight on some far-ofvw .q8zm45; hae;o1*6zitvyx aff bz 6f 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 table. The maof1l 27n4 f lga4-olvy5rgq+ggnitude of the gravitational force on each ba2vl-o g 4on7l +gg4q1r fly5flock is indicated on the figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal mas jus88iow1wg (ses are suspended from a classroom ceiling by a series of strings as shown iswui(8 81jgown the figure. Which string has the greatest tension?

  16.05: In the figure shown, tvofv,1ufo:jsw)e ,mat4 *ty- he mass m = 6.0 k。and the mass M = 14.0 k。are stati v)- je:t f*,tvowf1mya,uos4 onary. The mass 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 follt;fttzt vuyioa++wk *1 16v y,qcv.p0owing scientists is most associated with the following statement: “Fwv.i+tazy0 1cuy 1f6v;, t *t+ptkqov or small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figuw i l0:-kwj-1da tl-zxre, a force F is exerted at an angle of k-tl:0 ji1xw-a-z w ld$\theta$. 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 woode2*z jotnc+k pz/ fpbo)4zdj44 n box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the follo z*+ cpjb/44fz2tjkd4o zo )npwing must be true?

  99.08: A weight can be hung9ruid f;m+8rx1ji7i a in any of the following four ways. In which case is the string most lik xurj1iif9+;i a7rmd 8ely to break?

  96.39: Assume the objects in the follo xcl82+zhaf( kwing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most ll cz+ 28xh(fakikely to break?

  16.10: A person wishes to accelerate an object upward uniformlvtwcd*v ;,pg. okkf/ t y1fl,:y. Which one of the following choices must be true of the force F, provided by the per*.glct fvkf d1v/ky: ,,;tpowson 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 alov7,tbn5p9e;hm x.eqj 6c8l ro2n0jbing the x-axis, at one instant of time, the mass has position 2.0 m, velocit r m 865 qnjcxohvije pl7tn,2;e.9bb0y 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 pufp yi+ kh3 64ksr 4np( bq;d6hrq)x*ukshed to the right on a rough surface by a horizontal force of ;khhb6rprfnk6( d s x4u3y4+kiq* )qp 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 figureoc3 0mmsq*tex c4 58agom4ln 2 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 floor is 0.48lmsxo0 e2nm 34t*c5 qacgom20. The box is moving with:

  00.32: A block rests on a jar*w gar73 zwv)0u4n7 wja)lsu4f/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 steel6r-.aym-rq (p k eh+r:w4ovel plate as shown in the diagramy(qp --vw6+leehk 4 a:orr rm. 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 ,h:a ak0)gumcs u.s* fmakes 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 onsf*h.m:0 , ag)uakucs the block

  01.11: A 5 kg block rests on a flat plane inclined at ansh7 sqg 0 + rjnov:k)5edp2gzcv9+)fgge 8wi. 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 pz i9 +nfb7+qm7y sxw8 fj7w-exlaced on a second plane (where friction is significant) in inclined at the samesjn 7zy7e8x+7fbw+m9 w-fxq i angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magntl(k b- (ap7f bi-i n6/l s0qosbnl,5citude 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 incline5l,( 6q (btlbk- 7/oli0fpnc- snas ib’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at c- pku+:2h+hzhf t( sdmonstant 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 choices represents correct relatiou p+:shhm2 zdtk+h(f- nships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of6opghqwur 8s +:2zd; 0f efa8s 5.0 m/s straight up a flat sur8rgeh0sz:pu fdsq68w 2 f;o+aface 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 misplst yr (:r0;:nlkndg +baced on an inclined plane of angle θ . When released, the br(t :r+bn ydg0s :kl;nlock 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 the mass,m, of the block?

  17.40: A small object of mass Mx.ug/v xq 5efex++fo0 is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horqo/xu.0+gv ff xe5xe+izontal. 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?