07.10: Contact forces are examples of which of the fqp539 y ub/cseundamental forces?

  99.02: Which of the following terms is NO,-/mfa fyfih -T related conceptually to the others?

  02.20: The graph shows the relationship between tvi7-0 q,d sumhhe mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a repr uhqs-70,mdi vesentation of the:

  10.15: Three blocks, labeled wa/.,n(b; wxqxc 6at3jqecz4, gcg tv .b0jg3 A,B, and C, remain at rest on a table. The magnitude of the gravitational force xw3q.ncb.c;xgjj6abv g,c/ w4t(g z 3t0a,qeon each block is indicated on the figure. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a claslwik-iyvs3d9 m 8xu/hf (0up-sroom ceiling by a series of strings as s8 sw/ ly3vf(miud0ixk9-uh- phown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.l/o8fs4.x 92i /lpxw ( jfwterkovs440 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor lp4(2osvx8ixwf.wt sj of e /4rkl49/. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the fo tbieth 4fksy 2119o:ollowing scientists is most associated with the following statement: “For small displac1i 1e2fh btts9o: k4oyements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exertedb :xmi.-wx: sj at an angle of mjx: :s x-.iwb$\theta$. 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 along a rough horizontal floor at constrc4a;:d p:cpem3h gqs* q*s +f aya(i4ant speed msp aa3q q:e*gcaf i:(+;r h *yd4csp4by means of 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 f3pswoo *kwls) *)/h1f+s l)vt2 p xxddour ways. In which case is the string most likellpdlp *1w d/ osw23kxs o*h)v x)st+f)y to break?

  96.39: Assume the objects in the fo,6uq))-v7npttd g sqcllowing diagrams have equal mass and the strings holding them in p-tsg)qpcv dq tn, )76ulace are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Wrele7+2lr-n.)qhf x a hich 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 effects of the air or of then7rhe -2 x) .e+afqlrl Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of tim86qe n04sz; comdpr-ie, the mass has position 2.0 m, velocity 3.0 m/s,and accezp6ei ;8 4o s0q-dcnrmleration $4.0\;m/s^{2}$ . 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 rouh e d)*rto+t8x;slum2 gh surface by a horizontal force of 15 N as shown, during the push, the object accelerates unifort otx2dum*r+l;8h)e s mly 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 st0t. fqo+,3pu 8mjt68phtc wkliding to the right along the floor. A horizontal forcp+k8whtq .f 6t0pmu jtc 3o8,te 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 inclined at,o4hupz voqz+ 2u, i*o 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 showne. zsa5/l w afsx)i, 4br;teh3 in the dlxzs 4a)r3h/.5ate fwe i;b,s iagram 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 angle θ ( sdoja)dl8jn,o 9v4)+bwmniwith 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 thnlj +4sm) bd8dv n9, aiojw(o)e block

  01.11: A 5 kg block rests on a flatlo qr;3 gql qv58/,k/ ;lqslnh plane inclined 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 significa 8mkk1*m:a/ itg r3fdynt) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block and th1mrgkf 3 ya/:d8 imtk*e second inclined plane?

  08.08: An object on an inclined plane has a gravitational force of magnitude zyait1ut opx9k+:u2; 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 tou91 t2iz+p ux kyt;:ahe incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at 22yom)gdczi.b pj6f 9 constant 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 relabdpc29jyozf )gm.62i tionships between

  08.20: A person pushes pwmi a- ber mn7sp;401a block of mass M=6.0 kg with a constant speed of 5.0 m/sb;ae4p-1w 7mnp ms0 ir straight 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 misp; px djy6p/:felaced 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 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 coeffppfj/6 xye; :dicient 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 at4iwpm-(tygj2+fg gc c4f r ld.e2 (u1h the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The inclin(cpirjd-uchf (2 . ggfl4+1tgem2 y 4we 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?