07.10: Contact forces are examples of which ofq jkz- s ,9p2y ;0kpqs*3c,pu1maz gfo the fundamental forces?

  99.02: Which of the following terms is NOT jk-3)jsf8-5yr 6fox gxxee( y related conceptually to the others?

  02.20: The graph shows the relationsk:wt t26w76pb 4w yz hr9 8jh/z+suxnthip between the mass of a number of rubber stoppers and their resulting weight onhk4 t+w72yu9 :6psbxtw8jn/tzhw 6 zr some far-off 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.3le. vbzeu ix;6xd/1 m The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from bez 1dxmui3 vb.lx;6e/lock B?

  14.04: Three equal masses are suspended fs1/+qvhdn5h r rom a classroom ceiling by a series of strings as shown in the figure. Which s1h/h+ 5 dsnrvqtring has the greatest tension?

  16.05: In the figure 08ym6ys e0gk)+grw asg3d3 iz shown, 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 the string cgyy30 w0ggkirda6 8+essz ) m3onnecting the masses?

  14.13: Which one of the following scientists is most associated witngmm,2-s3/r/h o a itrh the following statement: “For small displacements of an object from equilibrium, therg2 /snmr,r/ t- ihm3aoe is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted egj;(9mdt j / ts*b(iyat an angle of g yij; (ms/*dttje9 b($\theta$. 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 woodenjlbklm)f5 5w -vgdnc6e+n; 4j box along a rough horizontal floor at constant speed by means of a force P as shown to thedj c-)kgm56n4 elnf+ l 5wv;bj right. Which of the following must be true?

  99.08: A weight can be e4 uap.c/tpuao3 c 1p:hung in any of the following four ways. In which case is the string most likely to bccpt:aou4ae1up .p3/reak?

  96.39: Assume the objects in the following diagrams have em.0 3w9 fxnh4 znhxvt0qual mass and the strings holding them in place are identical. In wnw.39x0nht 0 fvmhx z4hich case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which oa5r 7mhy7zaa mj0(6- pfw opq3ne of the following choices must be true of the force F, provided by the person onto the object? W represents the magnitude of the gravitatr7jp-apz7fomqw6m h 3a0( 5 ayional 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 one instant of time, the *l nt 7:ic5oxwmass has position 2.0 m, velocity 3.0 m/s,a5nt7l*: cwo ixnd 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 7 ukygxos o+w2vs n927a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to thn o7xkv sw22us9+ygo 7e 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 tqk0qzhu3r j79cr55q6uxf:ow o 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 kinet36o:xf u k5q rz hrqu7cwj5q90ic 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 ant)in-bewl/6ee /u iv3 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 shfqphny q9)5 qc7p6f*wv ic0 n/own in the diagram ny6qf0)*p ifhw 7q9c/pn c5qv 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 hmx4732d pmaa an incline 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 stat3 mhpd2a74 xamic frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an ang 9q- x:o p9ldzg.tbl/yle 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 (wig,k7.r) vb v csm-)9uuo-djzndiy;, here friction is significant) in inclined at the svi)dk ;s .)bnrz9 diuyum,v--,c7jg oame 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 o ;:qwubt2u.nl;3zm jmd0wy) bf magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coord :nu;.lm;b0du2jb)3w zwqmy tinate 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 at constant speej3pbfkyr5v 66zt j;*a d 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 extern3p5* 6fbtk; v6yr zjjaal 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 withp*6 j7hw uuwx2/yg g/e a constant speed of 5.0 m/s straightx*u/g 627yp e/jhwgwu 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 m8r r2of dq9)wangle 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 o9r)2w f 8qrmdon 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 frog o:0nq/tg6 lothi3b8m rest at the top of a frictionless incline. The inclinehas a mass M and makes an gn0 t3tihgq8o6/o:l bangle 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?