07.10: Contact forces are examples of which of the fundamentlnpx : sf5e;no)l0v8+)p ka.6 lhxxkkal forces?

  99.02: Which of the following terms is NOT related conceptually to tw gum(ry4vah43;,mwl he others?

  02.20: The graph shows the relations6 zsdm eb:1u.jpj94: c;alfql hip 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 representati . 1quj:j aep :bf;4m96czllsdon of the:

  10.15: Three blocks, lab5at436hwygc v eled A,B, and C, remain at rest on a table. The magnitude of the gravitational force on eacwh6tga3yvc54 h block 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 ceiling by a series ofye/nhkyz)dcibt8 +56 strings as shown in tz6t+hbynk 5e/dc)8 yihe figure. Which string has the greatest tension?

  16.05: In the figure shown, the c; 9/whvf:njstm * 1yfmass m = 6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of thj;sv y 1thcnfm9f*:w/ e following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated wieu*/)lru bzs9th the following statement: “For small displacements of an object from equilibrium, there is z/b9u*u)lers a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure,jxu*dd )lvaimh , 4 i71a89ide a force F is exerted at an angle of 19va i*di4 dhi8d7 m,l )xauej$\theta$. 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 roua-o9ip0tv(pcmb3ld9yp h9 z4gh horizontal floor at constant speed by means of a force P as shown-9i bpt4pv cmyd 3lzo9p0(h9a to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the fomjs.f a m5npjo6b141)2pl zkillowing four ways. In which case is the stri n)ml2 1 4mo1kjfbpi. jpazs65ng most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the stmtp4hvjt:;ogsf .6 -drings holding them in place a t6gp:;dtv.m jsh4-fore identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upwarvosa0vw n2c gu24 fk2(d uniformly. Which one of the following choices must be true of u0kvs2nfw 2o(42ca g vthe force F, provided 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 moves along the x-axis, at one instant sj )k6dx(j q (xt.rml0of time, the mass has position 2.0 m, velocity 3.0 m/s,and accelerati6t)0lqrd.(j k sx m(xjon $4.0\;m/s^{2}$ . 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 horizontf j6ha0 cy: jyo7ueolwy5: 36qal force of 15 5w:yy jfq676 : hyo3uoecaj0l 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 the figure t had,6c/ cwhf*r: bwj*o the right is sliding to the right along the floor. A horizontal force of 10.0 N isc/6w:* ah*whjbd, rcf 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 plane incl+rs mb3wk30e y8et+gu yz lwy-n)l+j4ined 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 steq ppc1eclo5.+el plate as shown in the dieq l1p.co +c5pagram 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 angle 6h ov)ucub 2k6 θ with the horizontal. The block remains at rest as θ is slowly increased. The vc626b u)huko 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 vt9s /*vl p2)t d,jih6i/aw leinclined 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 fr8:s uakyf0ss w0c .7gmiction is significant) in inclined at the same angle, is 7fms0gs.u ywk:0c8at 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 .smvn( gzuu 40of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this grav(n muuz04v.gsitational force for the 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 at constant speed on an inclined pl2w tm- 7 uw:we: 0xsmx7cnt*-gx,qof .d nkea5ane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the applied externetx:s *d ,:ewx0x5u7qc7 a nnmgf .kt2w-ow m-al 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.+uxl bkl1ep3 a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight upl 1lk 3p+ueb.x 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 angle8(q*p)r nn*pxe7aocg θ . When released, the block does not move. It is determined that the normal force acting from the i*np a*o8)qxrcg7pe (n ncline 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 re aa*eo)8ld 5,gzn:le ag+vcxbr /u2y6st 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 nor )ze:e/y,ogabl2+avrn6l xcg a *8 d5umal force from the table on the incline?