07.10: Contact forces are examples of which of the fundamental forsd lanm44*n0,ugt9e hces?

  99.02: Which of the following terms is NOT related conceptuall 3 8gi(jzvvgj5q;xd w3z )x1hky to the others?

  02.20: The graph shows the relationship betwsyrk fs xjo pc*lc4;qk -h+8+k6 ljb2-een the mass of a number of rubber stoppers and their resulting weight on k+*4-c2;86prslkxlfc jjobs kh-q +ysome far-off planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, xqxr8 4;jv3z up8ljo-remain at rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitqz;pux-jjl8ov4x 3 8r ude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom c.7qw-(q qb y yw0 r2qumd9fn-peiling by a series of strings as sh .qdyp -w-29bq y7fw unrqq0m(own in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。an719pj c)xpbmzd the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the followingj 19bzx7p)m pc choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most asse9x00 j9avg saociated with the following statement: ga9009ejsvxa “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompahsrgth-9/*hppl/2 /fa7 d4 -nhomz stnying figure, a force F is exerted at an angle of 4-slpap/*2dhm 9ghh-n/ r7 /tthzfos$\theta$. 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 rough horizontal floor at cors)6 1m ;a+nxuir2opp h:2 kjynstant speed by meou j2ir61 +s):yakr2ph;x mn pans of a force P as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. l/o63 coiett xld y1/h+pp*u 9 In which case is the stpt o+hucel91pxy6/3o /dlti*ring most likely to break?

  96.39: Assume the objects in the following diagrams have equal ma,xmfx) d6b 0ppc(j u.yss and the strings holdif,u6.( x b)dpmjc0yxp ng them in place are identical. In which case would the string be most likely to break?

  16.10: A person wishy ejezg 3;ha z:eom*./es to accelerate an object upward uniformly. Which one of the following chohzy .ez;*a:je3 g eo/mices 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.

  11.12: A 5.0 kg mass moves along:n 1pi9wv gag0m x8epi4kx9j4 the x-axis, at one instant of time, the mass has position 2.0 m, velocitye4ix1i40 gvx9an 9wmj8pg : pk 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 pujm,xf6nk mk(vq e6*u+shed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to th+mkk 6,mv(ju enq f6x*e 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 tm,wtm2e+w iui9ml+( whe right along the floor. A horizontal forclium w+,e+9twmim2 w(e of 10.0 N 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 plane inclined.ob6x4 nqilq,n, a62ueg bwk4 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 steel pla ec:r+fjo6fee2c ofdw98ip9: te as shown in t fc+e92oef c9jifp8:w6: deorhe 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 that make7h (3wgx ed5:ndcj;dws the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The mdecg7 w jwd3h(n5dx: ;agnitudes 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 planem6 pnj j nu..x;:gff)i 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 secoq 1x3th1q aza ;0eoj0ynd plane (where friction is significant) in inclined at the same angle, it will be;1a 0h atx3y 01zeoqqjgin 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 magnitude N 1qv0e+prn1ywy )d5f qrw2w 0h3 ol8q* c0 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 q3*q f 0)ye+v wnwh501y2 wcrq8lodprto the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed atq*w36oyf0 u9g)uplig 5snu e6 constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the fri3n uq y *u659)0ig6gfelsuwopction 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 block of mass M=6.dw a7fi8 (o m7ulv4iw4m41vt s0 kg with a constant speed of 5.0 m/s straightt4m (w owiafvl7v4iu 1sd847m 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 angle ( k.pyqu ,bt.vθ . 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 u.yvq,bt. (pk38 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 remz/g42cr d;dgb cc+q -leased from rest 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 normal force from the tabl /-gd +qmrgccd24czb;e on the incline?