07.10: Contact forces are examples of which of the fundamental foj00)pq aq7d2 jzqtzau l.a2z ld;:0 njrces?

  99.02: Which of the following tcdx3h( asjw0s ,fp4l.erms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between ttzqdwl,c; 1q 62 .ixrdhe mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope q.qwid drlxzc 21, ;6tof the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table.ooyx((f z,vb ) The magnitude of the gravitational force on each block is indicatedf(b o)zoy,x(v 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 classroomiyo *l p;q))fz h6 jr:es2e,zk ceiling by a series of strings as shown in the figure. Which string hle6 ;*2i ypzj))q so rkh:fez,as the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 jkwuz+fj b0-m4:m8soqg74hzk。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which o87bw+q4mz4jzm gkh0jo:u fs -ne of the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the fol hawje6zv3ng(cqu,0e55 kg /flowing scientists is most associated with the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”g( n0 zweuk/jgvhe5q 365 f,ca?

  94.26: As shown in the accompanying figure, a u a pv/bmo*fxsi0;c(+force F is exerted at an angle of 0ux+vpib o*sfc;am /($\theta$. 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 huexm hwte++0p5z 764kl)znw b orizontal floor at constant speed by means of a force P as shown to6kuh )50+ zbex+lp ne7m wz4tw the right. Which of the following must be true?

  99.08: A weight can be hung in any of the followingrjt1bdh9hr:8e0m/ r -wt 3 udz four ways. In which case is the string most likel0m3h9r t hr db81w-zjteud:/r y to break?

  96.39: Assume the objects in the followin:e jgmj43uh z/htlckrw r.7,0g diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most wr mzcre4u.jljtk h0: h,/73glikely to break?

  16.10: A person wishes to accel-led*h,by45 x xq .rtuerate an object upward uniformly. Which one of the following choices must be true of thet ,dh-xr45 *ybq xeul. 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 of time, the mum wpg 4e+8+yw6d 1vupass has position 2.0 m, velociw+vp +6eyumw 41 8dpguty 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-+z md-ip turoilpvi29f+gm )z* f.+e right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accelerates uuepi.--pm+ozi+d zt )r l9 i 2mff*+gvniformly 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 fig4 ei+d p:lf19hgiv5vrure 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 kinetic friction between the f5vipel4v9g rh:+1id box and the floor is 0.20. The box is moving with:

  00.32: A block rests on a flat plane incljc )+7) orf/s e8mwbfmined 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 -;;0o*lydi;ouw9 lcwkan k ,gfirst pulled across a horizontal steel plate as shown in the ;9o w0 g-;wou yalnc,;klik*ddiagram 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 inclik(9in);ild -kbull t 8ne that makes the angle θ with the horizontal. The block remains nuliikktd 8bl(-l ;9)at rest 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 flak x1z jqrt u:r/wl+v033 :uozbt 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 s:xu0xch(cn 2second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force s2n0 h: cxxuc(of friction between the block and the second inclined plane?

  08.08: An object on an inclined plane has a grsejtcg(((mv/:*omsk )bcv;y0i b( t pavitational 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 ;gepjci m: *)mtsbvk 0ot(c( (vs/ y(bshown 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 plane. 0, /frb+eh +8agrzqroh a3 at6The 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, a8 za at q+e0r/hr3bgho+ ,rf6and 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 a constant s mc6 4;o6 qkzzd*fksn2*gr1cnpeed of 5.0 m/s straight up * n dfrc*6kzsqk4gn6ozc 12; ma 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 misn;e z hfmfr.r):k2i)vplaced on an inclined 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 hrhki2. :n)fez r );mvfas 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 l eppe-*,5f pkM is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The inclip,5 lekp*f p-ene remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?