07.10: Contact forces 06tnep:3 eyjvfz*n +l are examples of which of the fundamental forces?

  99.02: Which of the following txct ligxbtyd;o)80wxy( ( ,9perms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a num fu/ y1w7vq-zvber of rubber stoppers and their resulting weight on some far-off planet. The slopvv 7qu1 -zywf/e of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C,-f7ni-2tz2b828 5oa vmm fyi vizo.qz remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. Wovf yziz z5a-mimb-f2 8ti8oqvn2.27hat is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended fr)of0 cczy4 p5rom a classroom ceiling by a series of string ryp 0czo)fc45s as shown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the m1miqotf+t961eph1r )a t *z8wgihn g/ass 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 tf gz1tti* 1e n)qphm8rt /g9 a+o16hiwhe tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the fij+krr4nizc(+ u m3srxf(+3 x ollowing statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportifi+jn s m x(rc3rkru+x i3z4+(onal to the displacement.”?

  94.26: As shown in the accompanying figure, a foravn1-e lh7 lfreea9/2 ce F is exerted at an angle of le91v2fh7 eale/a-nr $\theta$. 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 roughq6 )q xf;wz3vh horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must bew)qqxf6h;v z3 true?

  99.08: A weight can be hung in any of the following four ways.o+t(z u pixhmic*+62 ksga/z2 In which case is the striuo(c2 pkahzm6z+2g s*+t/ i xing most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and 2 5: 5d7 fostmraijsm5the strings holding them in place are identical. In which case wou7:d jfis52sa5to 5mmrld the string be most likely to break?

  16.10: A person wishes to accelerate an object upward un3wi,d xon +/g/c:ndl u)ft3driformly. Which 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. Ignorxn: /o)ngi,wl3dd3d+ rt c/fue any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of time, the mass hakvp/2a (2f n8d2sbjngh7j 4-enx5joms position 2.02jh42-e/sjfb5pn 2ak(nj mng x7o8vd m, velocity 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 2+-7txma q.jhkpkwr6on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates q rp7ak62thkj+x.- mwuniformly 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 to7 3kr)skbxoj il93id ; the right is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. Th9k b) kr;osi x7il3jd3e 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 inzw q999xozwk.4v , betv,yy4jclined 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 hw:b/9 er*jf. ls4 a7ahy)ktsporizontal steel plate as shown in the dieb k4./h9t*s7j)swr ap fy:alagram 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 anglpprz) w++yz; ne θ with the horizontal. T)+z p;+nrwpyzhe block remains 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 inclined at an aq/6rr 0wgf5:/ u fonn;rm z+bungle 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 pla 7us kb4 jp1o8+g*kvknt7cb2l ced on 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 friction between the block and the second inclined 7ostk1 2jkvg 7 8kubp *cln4b+plane?

  08.08: An object on an v 7;dmn9+mmzo inclined 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 z+o;7m nmdm v9the coordinate axes shown 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 a9 1zes g2:(jvnxrkb(kt constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the frictzn2s:jv1e kb9xkg (r (ion 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=6.0 kg with a constant speed ott.ksq :x,vu218lwx9pd7h ava+)hu kf 5.0 m/s s: xk)7u. uxtwp9+1svt l,h hak2qadv8 traight 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 inclined plane of angle θ . Whg f 0 5s;ec64wgwbb(igen 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 a(5ew giwcb06g4 sg;bfcting 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 di;uiq 0g 4sq,mass M is released from rest at the top 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 from the table o,0 ;iq4qdigsun the incline?