07.10: Contact forces are examples of which ofhrpjo7b3 5mgej5l0x l50p+l d:1da 9fymj:i v the fundamental forces?

  99.02: Which of the following terms is NOT re)qrgr ncn4i/.jj uk8ne jghr2 ;b8)u, lated conceptually to the others?

  02.20: The graph shows the relationship between the mass ofioqdc6 b, /m+s a number of rubber stoppers and their resultingmic6/,o db sq+ 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 tablh;zw.6 jx9sgi e. The magnitude of the gravitational force on easz69 gh;wxj.ich 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 suxhja( ku/w)3ospended from a classroom ceiling by a series of strings as shown xoaj( uwh3/k)in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。andlsf m2we(/+a q the mass M = 14.0 k。are statios(/me2wqf+a lnary. The mass 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 following scientists is most associated with the follo u6m8 qe5jdn orjk/9w : ff6sa2;ancp4wing statement: “For small displacements of a 62s5 ;n:enufcj8/q aodkjar pw96 f4mn 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 at an angle ofu t ez5,xjh81 **laevr7hc t:b 1ecu a zt57v8*jle :xrh,*thb$\theta$. 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+5mp l* s-bguj along a rough horizontal floor at constant speed l*5s-pum+g jb by means of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can 8e9h, .uy:xmycax/lsbe hung in any of the following four ways. In which case is the string mo eyu:, xc8ma .h9/yslxst likely to break?

  96.39: Assume the objects in the follow3z9ovmmh): )m agbl n2e(g)w aing diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break?oen3mbgz )l))9m(h:gmaa w2 v

  16.10: A person wishes to accelerate an object upward un)c6)vv 5s aozviformly. 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. Ignore any effects of the air or of the Earth’srotation) voza5vs)vc6 .

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of v.ejjh;:oks 9e *jla 4time, the mass has position 2.0 m, velos4 jo hv*a;9je.e:kl jcity 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 8r1nst b/g+eyavl7)pright on a rough surface by a horizontal force of 15 N as shown, durapl1 7 t g/evrnbs8y)+ing 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 slyq1ew3p;3 rp) q4 nduhown in the figure to 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 kinet )uql p31pn;4drqey3 wic 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 angvlic ;x2pq-)r le 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 zdk (3vs9er,m0d-h/e s w4 uorplate as shown in oez vr,3/0 essmw9uh4d(d rk-the diagram 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 thatl x*pozdul/3m - wh7;dl;(wr m makes the angle θ with the horizontal. The block remains at rest as θ is s- zpdw(;r3 x w7ml*ulmd;ol/hlowly 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 oc l pu1fp+bzb*2ccxj/+hk 2n2n 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 (where9uvadvb )9ga++l ;o ei friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of fedv9 +ua9vlg+); oiabriction between the block and the second inclined plane?

  08.08: An object on an inclined p4zlk8g9oeg jiazv xp,7 c1(43m mqe+rlane 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 the coordinate axes shown in the figure? The y-axis is perpendicular to the incline’s surface whizgxz ,plo7a8 v4r9gk1+4i3 mqm ec(ejle the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant sv( e;q;rk. n2cqcy/c7s a) khspeed 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)r2cq kve7k;c na ;h.ssq (c/y 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(dw x39om1-r:6qmw,scf ut oe a constant speed of 5.0 m/s wc6t9r - fedw:mm3,(q1xo soustraight 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 i xd q7*8xcubfl.xolgc ec( 8)5nclined plane of angle 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 t8( g c*e)xbucxd.8cq5l7oxf l he 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 rest at the top of7 y2izbst v6kwc 56*kp 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 tb c5vpz627kk*6siwythe magnitude of the normal force from the table on the incline?