07.10: Contact forcemox ;8, iu n*hobc0 5ho5ympt7s are examples of which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to the oo g(gc/m0) v *m0eojwethers?

  02.20: The graph shows the rel wfbg .0hgvg*6ationship between the mass of a number of rubber stoppers and their resulting weight on some far-offwfg*ggb0. hv6 planet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, ry7guq*z )u3 eqemain at rest on a table. The magnitude of the gravitational fo)u3 g7uz*e qqyrce 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 masses 2- td *. l5dc:z1z obg)*ezgmhf weon*are suspended from a classroom ceiling by a series of strings as shown in the figure. Whicfh2w-cd 1)ozt *:b.5 gle e*gmn *zzdoh string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and the mass M = 14.0 k。are st22wvo /o eg.1qx9( k( xefovidationary. The mass M rests on the floor. Which one of the following choices representsx i/ (v 1w(ed f2g9qoe2.vxoko the tension in the string connecting the masses?

  14.13: Which one of the following scientists is most associated with the followie2zh(;h r2oo76nw admh *k:i ing statement: “For small displacements of an object from equilibriuwek ri2a* hmh o;67(z2 d:honim, there 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 annwx)qx,kz3mi (zfwa 7)/c-dog xj;7s gle of 7)/f)(szqgod c 3 k-xwj7wixmax, zn ;$\theta$. 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 horz kj riejgs5iq29,u5 c;54baoizontal floor at constant speed by means of a force P as shown to the right. Which of 5r ;jzjbi4o 5 2su5ec,igq9akthe following must be true?

  99.08: A weight can be hung in any of the following four ways. In whijbrq1yk:r6xs eok.f2z m oy2- b. vj91ch case is the string mob1bkkv2e1r zyrqxomy j o.: sf.-6j29st likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and tho .l8v twb3.sii am(+t-mvqu8e strings holding them in place are identical. In which case would the string be most likely a-v(vqwu3b mt. il88.i+o mtsto break?

  16.10: A person wishes to accelerate an object upward uniformly. Which one 7u gixy90r 7ka)(f miigr 8)fzim q1g*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 frxm8(i uk ri70791z g yi i)f)qfga*gmorce acting on the object. Ignore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along thc:xii( jmnm: 7sjh c3q7am (:oe x-axis, at one instant of time, the mass has position 2.0 m, velocit hc nimm: (o3jis:aj7(c :qxm7y 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 a horizonth. j8ugp1ka f6kj 4e4gal force of 15 N as shown, during the push, the gkjk pf84a1 h g46euj. 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 tg l c: 4r g,4fi (s-m)chw2t1pxmrstq7he right is sliding to the right along the floor. A horizontal i rm)(sgg 2: r qcxlht-,14 4pmct7fwsforce 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 g :-am(m9msw- gpxk:son a flat plane 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 across a hog gukr/5mgg:8afd m t+eeo 8(7rizontal steel plate as shown in the diagr:( e+gt/f orge8ugmadm5 8k 7gam 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 inclil;j gjj8d b26af+5x bcne that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the norjajj;l2cxg6bd f8+5bmal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane incl8y7aqpbub :3j ined 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 is signifim7te 7b8f1n,rg,w3cks (hgln cant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction between the block and th fb(3 h,l cs7r8kmnw te,1g7nge second inclined plane?

  08.08: An object on an inclined plane has a gravitational force cei,nymmj3o 83k:nh8 of magnitude N 10 acting on it from the Earth. Which of the following gives the correct components of this gravitational force for the coordina ,3ih3m8mo8cnen :jkyte 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 on anegco plr+3yj1i ;0l:i z58e di inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction for1yd i8e: le5rjpizg30i ;lo+cce 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 du * 7qxt.if+jv;m.rekg with a constant speed of 5.0 m/s straight up a flat surfacejve +;.drq*.7xiu tmf 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 angluixoo du-y z 5:b: +t40vlqlu-e 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 wh v:utqdy ubl4uo +0-:-5ziloxile 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 at the top of a friiv(wtpg-t s(v cx.5b +ctionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains pv+(xw. gi 5s bv-t(ctat reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?