07.10: Contact forces are examples of which of the fundames+ *r4l9 dlyea e. q2yhp7ma6intal forces?

  99.02: Which of the following terms is NOT related conceptually to the o2w2f-qglg;hpors d1c ; 6 ,xpdthers?

  02.20: The graph shows the relationship between the mass of a numberc:lok9, iv6 se of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a 69sl vk ci:,oerepresentation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table.s r td7zicu-). The magnitude of the gravitational force on each block is indicated on the figure. What is the magds zu7r-ti).c nitude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceil+u84 wnxm6xh p zk00oning by a series of strings as shown in the figure. Which string has the +hno80zuxw 4m kn06pxgreatest tension?

  16.05: In the figure shown, the mass m = y9ugmh w2r61k6.0 k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the following choices represents the tension in the string connecting the 2k6yuwh1mg9r masses?

  14.13: Which one of the fom: u3 kctq18xpllowing scientists is most associated with the following statement: “For small displacements of an object from equilibrium, thekcp:3x tqu1m 8re 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 angly3)cy6xodvz-d1 f-fadx ;s v0a2d (z ne of z d (zvx sdxca2v ;fny -30fod-1d)y6a$\theta$. 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 horizon cezwaqh0 n7tu2)w5+ stal floor at constant speed by means of a force P as shown to the c 5)ewtq 0nua2zwsh7+ right. Which of the following must be true?

  99.08: A weight can be hung in any of the following n:f)rbb 1xzyv 3 uv; 1sq5nc6cfour ways. In which case is the q5:x r b3c6v svf1zn)y1;nbuc string most likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and thev)s 6qmc1 k/k/gjdvv, strings holding them in place are identical. In which case would the string be mos, sq k)k /vgv6v1cjd/mt likely to break?

  16.10: A person wishes to accelera drf 2 cedl;)+xyb0r0fi-gb,fmyr:r4te an object upward uniformly. 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 i+ r,x4rfrd-fdf br 0myc0leb2 y :);gthe object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along pvn2x ggg1lasxq4v2j+. v,1c the x-axis, at one instant of time, the mass has position.jg 1xq,x 4nvgvcv2gp +a1s2l 2.0 m, velocity 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 a rough v;hgm8 n2-xx5ar lfz2bx1+(u azk(prsurface by a horizontal force of 15 N as shown, during the push, the object accelerates uniformly to txmpxvz2k852a+1 z-ghr;a ( xr bu(n flhe 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 xmf28pv6zq 0vxv1m/r the figure to the right is sliding to the right along the floorfvv1m 0 xm2v8 6zqpx/r. A horizontal force 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 pla0/wn kbaw1fw-f wj m ,f*oy.(eljos) 7ne inclined 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 acchefo8906 pzi 7ru94vg7bn udross a horizontal steel plate as shown in tecf49r 6pg 8d u9hz7n07boiuv he 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 makes tu ,cr)*f-mb8+0wkc udnuheb 4he angle θ with the horizontal. The block remains at recum-knubc) +,dhr b0 ue8*4fwst 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 inclineo0bx*;vqk (e*p 0kn jcu7+cji ug+8chd 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 frictip0 jm hk6y41mzon is significant) in inclined at the same a46hkm0m jp 1yzngle, it 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 magnit,c5 jk vt9ez2tude 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 5t 2c,k9 veztjis 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 spen ix9(m3rjkb/ w)ohn 3ed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction forcexnh 3 oi3w9n) mb(/jrk 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=6.0 kg with a constant spe42 rf/l m+jn2n sko*wxed of 5.0 m/s straight up a flat surface ik j4n2rn /2x*lwf smo+nclined $30^{\circ}$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 bloce58ipb z0y 7wxk of mass misplaced 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 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 blocx e 58py07zwbik?

  17.40: A small object of mass M is released from rest at the top of a frictionmvyi:q l6 8fh4i .(8. hobkmfvless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as thesmall object slidl.6:om fmv vf.ib8y4h8(ihkqes. During the slide, what is the magnitude of the normal force from the table on the incline?