07.10: Contact forces are73rkxc te,u*j2h 9;ybb0s5 fh bcz4s x examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related con1gctbqz, p- k(i)mb 5oceptually to the others?

  02.20: The graph shows the relationship between the mass of a j at *fhe4fka-):) jvinumber of rubber stoppers and their re4h*f)a)f jtv -:ekja isulting 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. The maz7 l9yrc/m74+mt hlsognitude of thehol m 4rl77t/+zs m9yc gravitational force on 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 ma,av3c4wo:0uu rdt++ mrn(dk o j8 brx7sses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tens c bwa o4v308k(xmo+d7j+ tr udnu,:rrion?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.02.kk 3dv--ozy5cz rfl k。are stationary. The mass M rests on the flo-kdl.rczf y vzo- 253kor. 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 th -fbch *ed39gd o5ljn7e following statement: “For sm d9cn5e hf*db- o73jglall displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accompanying figure, a forco.rxjmq; p4 e2e F is exerted at an angle of 4emorjq.;x2 p$\theta$. 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 flouxa ;vr52ht z-or at constant speed by means of a force P as shown to the right2a rvzx5 uth;-. Which of the following must be true?

  99.08: A weight can be hung in any of the following fouq 1cnd+lqnnux0**pg6- x cl3kr ways. In which case is the string most likely to brean gk1nc*xqu*d pl+6- l 30nqcxk?

  96.39: Assume the objects in the followi,k)izv.2j l9q0 7hqa7krxkuk ng diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most l0kx,9rh l7kzi. jvkqqau 2)k7ikely to break?

  16.10: A person wishes to acce iudyjggc vf ,c1d)e lv/tf 9a,p;e z3ts.)(y5lerate 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 the object. Ignore any effects of the air or of the Earth’srotation.jivsg t,g lf ) ,.5t)/3zape1vccfdyyd; (eu9

  11.12: A 5.0 kg mass moves along the x-axis, at one instant of timet)cs dmsp/dy6 *vci45xz r5 a+, the mass has position 2.0 m, ve6 /dzrxa+i4 dmys sp) 55v*ctclocity 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 surface by z lc5oyd: eo2 vcdm 4zt7,2-yra horizontal force of 15 N as shown, during the push, the object accelerates -dmy tv e :57co, y224dcozzlruniformly 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 nyeqhr5iby/q 0; z6,j right along the floor. A horizontal force of 10.0 N is being appl;/nij q6ye,zb5y qhr0 ied 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 angle ofd(kwkc7 ok51xq7b(zj /j7b oz $30^{\circ}$ 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 p 34r+ubhsd76x5 xssvd -fm3c-zqh 3dhulled across a horizontal steel plate as shown in the diagq u5 7zhdhs ds-d-+cbm3h33xrf6sv4 xram 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 thdfach+ o9jf :,8a4n xjcm74 ise angle θ with the horizontal. The block remains at jifh xo4ns+da4ac :c,mj8f9 7rest 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 rednc0y lkrxj-g2 2.sy7 r v;r 34ornbc5sts on 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 (where friction iwu ,wc)n);3k tc1spxms significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between 1n ckms;)puw) c 3wxt,the block and the second inclined plane?

  08.08: An object on an inclined pkcm ybs/ l)0-+mi) 5nebsjzy)lane has a gravitational force of magnitude N 10 acting on it from the Earth. Which of the following gie zky/ +n cm)mly-)5jss0b)ibves 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 while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed ard111,e-ciyiv7ims iu v a9o2 t constant speed on an inclined plane. The free body diagram of the obja27di11rioyi,vve9 1- uim sc ect is shown with the gravitational force represented by W, the friction 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=6.0 kg with a constant spvdp - 4fnkew7o5.1vz teed of 5.0 m/s straight u41 kvte5fpn o.d- 7wzvp 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 anglej ho 2mvlhbbap*/b- ii/m v6j -.5hgi8 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 c6hv-aob5m ij-i8/ v g2pb h */.jilmbhhoices best represents the mass,m, of the block?

  17.40: A small object of mass M is released from rest a*bnzlo;+szmbyd oe,ca7m90z z,i 2k3t 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 slidblm0az;m*zdi9+7oz s2 ne3,k ,cbo yze, what is the magnitude of the normal force from the table on the incline?