07.10: Contact forces are examples of which of the fundam/ /nd:u8maoaqdj:x w8 ental forces?

  99.02: Which of the following terms is NOT related conceptually to th vfx v1d8msq.og, -y6pe others?

  02.20: The graph shows the relationss7twfd75v b:n hip between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of the graph is a representation of thed w7:bns5 v7tf:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. The magnib2) c)71zu6aiu0ii ac cvanbw21r 2egtude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force one6cwi2cv)7a 1 iau2 rg)niuczb01 ab2 block C from block B?

  14.04: Three equal masses are suspended from a classroom ce,u.ed*1zbj nk* 1md0z-voqa8apzb 7l iling by a series of strings as shown in the figure. Which string has th1bqa **z l 87zz.10v-uedamdnp , jbkoe greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mx w5me4s5rgrz6;r fv+sn0t. m ass M = 14.0 k。are stationary. The mass M res;sx0rrw5s ve5mt+6f nzr. mg4ts 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 withjs q1x *y 74vo1phz7mx the following statement: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the dispv74*xy7o j1sxmp1 hqzlacement.”?

  94.26: As shown in the accompanying figure, a force F isq7x nf4sm:vi , exerted at an angle of f4,7 q:vs nxim$\theta$. 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 rog53 m7 ey0jyphugh horizontal floor at constant speed by means of a force P as sp7yyghj 05me3hown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which ca1ioc iwd1(u87erg3ogse is the string most likely to break? o1igg3 8d7 wcui1(roe

  96.39: Assume the objects in the following diagrams have equal mas3 i7y/bw7vh 5zbu 6y/om,hld ys and the strings holding them in place arvmiz3/bl wy67 u7hyo,/b 5ydhe identical. In which case would the string be most likely to break?

  16.10: A person wishesa7zs hj 8b29dqs)yo*q to accelerate an object upward uniformly. Which one of the following choices must be true of the force F, provided7yjobz a98) d2ss qhq* 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 0( ds8m bof7zmthe x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m7 m8d fz0s(obm/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 ax, tvewg2;f7o )4cj8i mhsc0is pushed to the right on a rough surface by a horizontal force of 15 N aav7cjx4 hg),8 eot f2s imc0;ws shown, during 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 shown in the figure to the right is sliding to the right xzmb55iee6 /7hnt 8vgalong the floor. 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: b7xneiz 58/vhmt65 ge

  00.32: A block rests on a flat plane inclined 0 (rlc)wkzb r(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 wv7rvtlf9yn biz0 d.(6 e3l*jis first pulled across a horizontal steel plate as shown in the diagram n yv*wl6l7e0jbi. f39dzt r( vA.
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 ; bupmi 0myw c5(u3w0bthat makes the angle θ with the horizontal. The block re;yp0b wm3cub um( 5wi0mains 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 rest-j go 5rg9din jrls-/4s 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 frictslqp66h u/bh3* dh )gtion is significant) in inclined at tht gbq/pdh6lh 6u s)h3*e same angle, 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 foff vrtc:33 ev5rce of magnitude N 10 acting on it from the Earth. Which of the followc :3vve3frf5t ing 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 while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed o4ohrqx nyktz.*y /50n. zd9 sjn an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f,tn0qdx y y/n9s.z* zr5. k4ohj 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 s/ 3):las2 6po otwhmzpgob+8mhe9kt 4 peed of 5.0 m/s o3amg) :htzo6/pk2b 84ohwl+ ps9emtstraight 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 on0xnhcb :u9;mzy +hmw. 6yq a7f angle θ . When released, the block does not move. It is determined that the normal force actingqw c;ahmy m nzhby:06uxn9+ .7 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 block?

  17.40: A small object of mam *4qph r- ig/qmj:(vic:mml:ss M 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 incline remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force fq*vqjg4m::mmi hr i :mp(/ cl-rom the table on the incline?