07.10: Contact forcesc+6k v7zl8urqhrlag( b7-z2 n are examples of which of the fundamental forces?

  99.02: Which of the following tx,m2edg 64k:nar/. / bbgua rnv1z5a perms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rub ktz (zwj8a;c;ber stopperc;k;jwaz(tz 8s and their resulting 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 magnitudd )p8(c -gqqxf/, arsye of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact force on block C from block g)cadxqy (s,q fp r-/8B?

  14.04: Three equal masses are suspended from a classroom ceiling by a series/el4c)if q,q w of strings as ql ie, )/cqw4fshown in the figure. Which string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0n36uhul82 ufic:xiz1uf1 yq, k。are stationary. The mass M rests on the floor. Which one of the 1fnl i hu y3:i86zx,u2fqu1cufollowing choices represents the tension in the string connecting the masses?

  14.13: Which one of the fid 1:*h4rg gij n1o.dgollowing 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 displacemengo 1jh.dgd:r*i41n gi t.”?

  94.26: As shown in the accompanying figure, a force F is exerted at an angle of 8lrpeze k -kv 1.x-iz68z1--k lpv 6k. erxezi$\theta$. 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 constant s24 yvd t5c1usspeed by means of a force P2s4 ds c5tu1vy as shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of thewexs3vk7y.t 6j) sv8e following four ways. In which case is the string most likely to 6evywx8)j7s s.e tv3kbreak?

  96.39: Assume the objects in the following diagrams1jl2ljm +m c,x ldcu*) ix k*vn24ia4c have equal mass and the strings holding them in place are xm4+ca*ci) 4dkj2l1x, m2i *luvclnj identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an object upward uniformly. Which onefu0vv d-o8 aq3v w5gy8 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’srotati uw g850d83vva-qvo fyon.

  11.12: A 5.0 kg mass movrlv/u-, .exvs0re5hbauc k5x d ()e-zes along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,and accrk)l/ce0bhvr(, ev s -5u5x -uz.d aexeleration $4.0\;m/s^{2}$ . 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 rc ;w +qnn)ny tka.2jw-ight on a rough surface by a horizontal force of 15 N as shown, durin)na;w cq-nwt.j+yk n2 g 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 rig.q2kmm; *rbahs k:gc7 ht is sliding to the right along the floor. A horizontal force of 10.0 N is being applied tb;2 m7hgk*.c:srm kqao 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 mzui5 9qk1 r1nangle 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 plate as show sk2-jisy4 e+dn in the diagram A -sksjyed2 i+4.
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 o90 o1vo( klvqun an incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and the static frictional force of the incline(kql0v9vu1o o on the block

  01.11: A 5 kg block rests on a flat plane inclined at an mngdx ismcd07p /i0u5dz-o 94angle 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 is significant)wll/e3sz, l p mp3v3pv vmi7:5 in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the bloc5:vmv/lp sle73z p ,3mw vp3lik and the second inclined plane?

  08.08: An object on an inclined plane has a gravitati19r o*ea grepy a f;z)r.3:gmnonal 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 shown in the figure? The y-axis is perpendicular tzrrymn fr 1.oa3:9 e*ge;pga) o 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. ;48/ mi.s(jabdfo 9 f yx/fbkjThe 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 f i4j.f ;kj9dmbby ox/fs(/8ato 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 speed of 5;kwqjx 835pka .0 m/s straight up a flat su5;jp8x kkw aq3rface 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 θ::dwcw1 ,/+xebz msar . When released, the block does not move. It is determined that the normal force acting fr xcread, w:swb /+:mz1om 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 mass M is released from rest 0 aoz1sa c8 //-dpu42dodsodeat the top of a frictionless incline. The inclinehas a mass M and msdoo018a/ 2 cad 4/dsepo- dzuakes 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 table on the incline?