07.10: Contact forces are lp(2 rohi d/ff53ego8examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conc y7*-9d)u+ pukez gdpi0 -uxjeeptually to the others?

  02.20: The graph shows the relationshi )s(.ui af0qwd ohr91yp between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a (9 uy). irqow10 fhasdrepresentation of the:

  10.15: Three blocks, labeled A,(z1ysykzr: y12pq) e .v/uub*ddrc0cB, and C, remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure cvd(d2k 0*ur1yzps uqyey1r )./:zcb. What is the magnitude of the contact force on block C from block B?

  14.04: Three equal masses are suspe*7ek7tqgh s:xr k +0whnded from a classroom ceiling by a series of strings as shown in the figure. Which string has tht x7:wh7ke+gh0*k s rqe greatest tension?

  16.05: In the figure show/ah;;/g xh vu3b 1zo-qcjxo,in, 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 tensi ,o- z;gv /hu/chxox3j 1aqb;ion in the string connecting the masses?

  14.13: Which one of the folqxqt)t(g1 -khlowing scientists is most associated with the following statement: “For small displacements of ahqt)xgtk q1(- n 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 exerted nl2(qbd3cxr.at an angle of 2qc b(dlrn3 .x$\theta$. 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 a 3+fexb1qtg:gg6j 8 twooden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which ofgq:t e3 bg1tagfj6x8+ the following must be true?

  99.08: A weight can be hung in any of (xs2wmuli/)o the following four ways. In which case is the string most likely to breas)o/(umw lix2k?

  96.39: Assume the objects in the following diagrams hur hjn f3+l4r6ave equal mass and the strings holding them in place are identical. In which crj +f4lh un36rase would the string be most likely to break?

  16.10: A person wishes to accelerate an object upwardgr3 e/ny d r.enb(f1q- uniformly. Which one of the following choices must be true of the force F, proviyg-(f r/ben1q 3edrn. ded 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 the Earth’srotation.

  11.12: A 5.0 kg mass moj4+xkfwwb.:k b q,8idp4 a0 asves along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelerbj8p,awb4w .fk+xs :idkq a40ation $4.0\;m/s^{2}$ . 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 horiz xmh8hgac*3f: tp2p+ nvy,/x kontal force of 15 N x2m/3 *:nvc pt k8phag+yfxh, 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 the figure to sld bta)5d,7;zhv j 1gthe right is sliding to the right along the floor. A horizontal force of 10.0 Nv,ztjs5 gdda;1 7hb)l 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 plaw*gvd09v0x *rsx1s 9 n6ynpk gne inclined 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 stee43 fbz+3 squyp)xq+ /vove3rel plate as shown in the diagra/vq3 + 4fz 3b3y qv+eu)oxeprsm 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 ag.nw9wdj gvkc+z 421bob ), ypn 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 t2k9b vjw zc+yno41pb,)d. wgghe static frictional force of the incline on the block

  01.11: A 5 kg block re 91vilhi3cndne7; 2pz sts on a flat 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 ib*0u5a5b, ugu lquj e:s significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction betweenuuga5u0b *:,bujql5 e the block and the second inclined plane?

  08.08: An object on an inclined plane has a gyqs4vy g,2 /g-uugot(ravitational 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-axi/u2sqgog- ( ,g 4ytyvus is perpendicular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is beispcsw d:/3i2c ng pushed at 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 fols /3p2:diwcs clowing choices represents correct relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speeqjyrmrt-2x5-q 9 ,nss d of 5.0 m/s straight up a flat surface -xr qs2y q9s-,j5 rmtninclined $30^{\circ}$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 k/*yqp) kpxm0of mass misplaced on an inclined plane of angle θ . When released, the block does not move. It is determined that the normal force acting fp x m)qy0k*pk/rom 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 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 from u7a7 6oqc7wm qrest 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 slideq ma6 o77uqwc7s. During the slide, what is the magnitude of the normal force from the table on the incline?