07.10: Contact forces are) t7d m6f- w18 dtkmk2o,wmho4bmero* examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually toz h f/ ,ug-d,wxt1i(xl the others?

  02.20: The graph shows the relationship between the mass ofn8;zg-*/uh qakp cgl 2 a number of rubber saq2 u -gplk*n c/hg8;ztoppers and their resulting weight on 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. x;n t.ns:;x-a.e edsaz)moj 7The magnitude of the gravitational force os)te.n ajdm7:ae xx.;sz ;-o nn each 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 sl8 o)h/e s 3+zuu3hxdpb hnf;;uspended from a classroom ceiling by a series of strings as shown ilu;zs p3 u odh)hb/3h;xne8+f n the figure. Which string has the greatest tension?

  16.05: In the figure shown, thuj /pn*:.z +j3dt4mjrh,dxin e mass m = 6.0 k。and the mass M = 14.0 k。are stationary. The m/z pxu +d .rtjj,4hn:*mdijn3ass M rests on the floor. Which one of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the followine3 :3pbcik b e8eck3m(g scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportibm8c3k: eckip3(e eb 3onal to the displacement.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle of /gb6t aru8ud8: 9njwh:g/6uah9 w r8 dbjutn8$\theta$. 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 txp:9a7pcxrwtp6 svy( t01-jwooden box along a rough horizontal floor at constant speed by means of s 6rtxa 0 p-v9wcp71jpy( t:xta force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in anyb stbz;s 0--73mlb uxh of the following four ways. In which case is the string momb zsl-bt su ;0-b3xh7st likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the strvsa b:9dek7 4lings holding 7l e:dv9ab4skthem in place are identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unifo;d n z.gfibt7,lr)so6 rmly. 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 acod.;t zfrb ,6si)lg7 nting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along-n,njg5w :(kg qnemjx0- .f eo the x-axis, at one instant of time, the mass has position 2.0 m, veloc(5-o kfgxmjn:qnw-0 . e,jngeity 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 hnce (2o*z)q ja rough surface by a horizontal force of 15 N as shown, during the push, the object )ozejhc(qn 2* 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 the right is sliding to the r q9ti-ul c9v4wight along the floor. A horizontal force of 10.0 N is being4i9 qwtu9l-c v 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 inclined at an cvm/k*3,. q of 1tiqcmangle 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 platj73ruzf m0j;gh4jmh4 e as shown in the diagram 4; j4j7fhr m0gzm3hujA.
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 make/xo5h d0giv 3uh g.t7rs the angle θ with the horizontal. The block remains at rt5 r7ug .ohd30v/gxi hest 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 7n/yss0 omy tt, d4yt6an 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 (w5qmyc (ok1 oo7here friction is significant) in inclined at the same angle, i5k mco71qo yo(t 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 of dj 4z*i6uens 9yogv*raf4(8 tmagnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitationvjngazoi464r u8(*d *tye9sfal 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 puzfgaith2ak97y uag6 j7em-; 7shed at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the fr; e7jg-az267u7h igm tf9yaa kiction 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 bloca atc(t7nd9q le9mj8*tk62 sm8c c1 fbk of mass M=6.0 kg with a constant speed of 5.0 m/s sm7n a2dm9*e1ak 9t f(cc868 qcjsbttltraight 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 anw.qw phi2 hvtwbeam 3ht*9hp-q3 +6m *gle 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 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 tqpeaq3+pmwh- 6w2i93v h.mt bth hw **he block?

  17.40: A small object of mass M is released from rest r.ake 5(a7ze oat 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 tabz5eor e (7kaa.le on the incline?