07.10: Contact forces qo ptqyk9au4zi/+:4 m *aq4sh are examples of which of the fundamental forces?

  99.02: Which of the following terms is N4vpv9 jf8 pe2eOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a nc5 +lub/nbjp, umber of rubber stoppers and their resulting weight on some far-off plan+ , bbucpj/l5net. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain atyro8a; ifzxnl3x c+ ia4j,/t nh:x:8m rest on a table. The magnitude of the gravitational force on each b:+8hn /m4xx;rconi y,jl8 ai3:at xzflock 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 classroom ceilingt:r8t- q q*dgy 8g9xs5t w9kvn by a series of strings as shown in the figure. Which string has 9:sntx y w*kqvqt 9r85d8 tgg-the greatest tension?

  16.05: In the figure sz66)2 r3( ogzt3hapkqw6 qqjghown, the 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 in o 6aq63q2wzjg )3rt(6kphg zq the string connecting the masses?

  14.13: Which one of the following scientists -;3 (t uo6phmln:lmxzis most associated with the following statement: “Fmn (xhzlp3o:tu- ml 6;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 figure, a f ky;i9mgf+ih3orce F is exerted at an angle of ;gi9m+ i3yhfk$\theta$. 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 hi7s2btmry c :r0(+qs*4ar rhdorizontal floor at constant speedr 0qsrcmd*h 2:r(itr4+sb 7a y by 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 fou x-ikqg qesm3h/;q3l1r ways. In which case is the string most q/ms1 xih elq kg;q3-3likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the strb-xtes x *gg)1ings holding them in place are identical. In which case would the string be most likely to break- x1xegtgb) s*?

  16.10: A person wishes to accelerate an object upward uniformly. Which one of toxx hcik j:hn7e5 ::l1he following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of the g: coxlhei1x7:njk :h5ravitational 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, at ox l+v .rvvpy (8f)y1 dqm/mlb4ne instant of time, the mass has position 2.0 m, velo m 1dv)vbxp+8v yqrl4l/y (fm.city 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 to the right on a rough surface by a mt4 nq s*t)htze40iw.horizontal force imt4z4w*qthts e)n. 0 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 in t9m/t ly2rxnl2 g.dkez2 e1p-ehe 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 e/tk1 2lzd-eg9 2m2rey. lnpxcoefficient 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 inclingez ibkw8oub r/ l 27cs1i,1y7ed 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 plat78xnbv a(*bz ie as shown in the diagram A.xb8 ib*nv 7(az
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 inclvdrhi m7 wuy+9+7-vfaine 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 s 9 vuawmh7i+y+v -fdr7tatic frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane i-as : ta92)f2hfinr vznclined 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 secong jrk0:syt ;b63hg*t qd plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2kgy3jt6sqhbr ;0 *:tg.0 m/s. What is the force of friction between the block and the second inclined plane?

  08.08: An object on an inclined ass9ew*7o dhoy sf*63 v 5jpy,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 perpenda ef6s9w* s*y5js7 opdyhv3o ,icular 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 on an inclinekv)a7/uy f7wy d plane. The free body diagram of the object is shown with the gravitational force represented by f)ukva y77 /ywW, 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 bloga3u3 w1 2tj) g5tcnbs*+lohfck of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flaoa 33h5 flj1sutnwt c*)g b+g2t 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 inclined plane of ankgds: nsg hhka)96 *;xgle θ . When released, the block does not move. It is determined that the normal force acting from the incline on the block has ahnk96dk:sx)* gsg; ha 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 +ycu9*ky*t0 g 3q /hkry71x 8klssaowreleased from rest at the top of a frictionless incline. The inckrylc0usky/ykx ogs78 *qa*h9 +13wt linehas 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?