07.10: Contact forces are examples of which of the fundamental forn,2dr3t sit3el:ns3j/z2 xq ices?

  99.02: Which of the followi ( qt0s22uenjjng terms is NOT related conceptually to the others?

  02.20: The graph showssx*qg0hwgoo9/.z 0j ru q,g1s the relationship between the mass of a number of rubber stoppers an g9j qg,.uh/0o*szo g x0qswr1d 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 k-w y: z .o5-sr; wyypadjx*j8at 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 bw8;k:-w yp-ay* sxr5oj.d jyzlock C from block B?

  14.04: Three equal m ht9j7z*t:qah bdsf(4asses are suspended from a classroom ceiling by a series of strings as shown in the figure. Whhtz4 a bq9t j7:s(*fdhich string has the greatest tension?

  16.05: In the figure shown, k nai f*;u5;wxt:w3adthe mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension i;;inwf3* 5u xadwkt a:n the string connecting the masses?

  14.13: Which one of the following scientifm 3-8 ngh)dyssts is most associated with the following statement: “For small displacements of an object n ds m3yf)8-ghfrom equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a forc iqah ,4cd+ scjrk7j* 9rjq:qm*+u6v ie F is exerted at an angle of : jhar7*r +jis,ukijq 6d4cmq*9cv+ q$\theta$. 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 ho/x 64z(ndzzyuw f -c/yh0 xka2rizontal floor at constant speed by means of a force P as shown to the righ/ fzu c0nx/y4a-h xzd(2z yw6kt. Which of the following must be true?

  99.08: A weight can be hung in any of the following four /w tomv9 z,alqn(h-0m ways. In which case is the mm n0tolz(,h9- w/av qstring most likely to break?

  96.39: Assume the objects in the fyq9g/ jlq vhrl8h-j*8 +6e3ufna fuq.ollowing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely t8ujq/8+9-6qjyglh.a uf ne fh3 *lvqr o break?

  16.10: A person wishes to accelerate an object k8 sh82*y*bnv4w( t os2wtz1bupd2 vkupward uniformly. Which one of the following choices must be true of the force F, provided b8* ktst(v12d 8vpswyw b 4on22bh *zuky 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 the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis e*0a6nrb ii:ns kof/,, at one instant of time, the mass has position 2.0 m, kbn6*: e,isf onir 0/avelocity 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 ir88 pliy0/t+c4s yezyfse2exhz i583 s pushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates unif/tzyl x8 5cps34yhfi80 es82ieyr+zeormly 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 8pea75ii gv6 +lpn ze*in 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 floor is 0.20. The box ie+58ai6pnv iz e*7lgps moving with:

  00.32: A block rests on a flat plane inclined at ak k/yqx7sqnf 3um1j ,/n 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 ste9uuw3epuc8 oww5) u 6bel plate as shown in the diagram 8 o3b6uuu pec)9 5wuwwA.
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 ztm+ k:jax9c /0h)ijn7fe t.d with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional forn0.h /etmfkac t+j:j79)zd xi ce of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle yr(7im)787yhlx /+t lvubth 0pnn +h.b 8atweof $30^{\circ}$ 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 op9 z,6s4 orvjvn 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 4rozjpv6s,v9 friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational force b; ;i.uicv t9ahsw x;rn. tq2v5 fb/t3of 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 sh ;2 t.bini; v9/s3.at c;wruvtbxf5qhown 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 constant speed rkurt:v mo9zk: :b8c6u u::skon an inclined plane. The free body diagramz9bk uvt6us :o8::rcu kkr:m : 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 relationships between

  08.20: A person pushes a blo)maave+nj1h;.: n piyck of mass M=6.0 kg with a constant speed of 5.0 m/s straigham+: ey ivnh;jp)1na .t 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 incli7wfig 81qt l0:fo0eq fned plane of angle θ . When released, the block does not move. It is determined that the normal force acting from the incline on ffw qiegol01 t0fq7:8 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 rzb(9j3 8n)/qwf mrls from rest at the top of a frictionless brrmfw3s 8( lz)n/q9jincline. 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 from the table on the incline?