07.10: Contact forces are examples of b0,.uthdqrz9 which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptua-7sa-m zmutout r:o 39r5ln/vlly to the others?

  02.20: The graph shows the relationship between the 3iv5vr 3ka c0amass of a number of rubber stoppers and their resa i5av3 k0vc3rulting 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 /gle3qk yw* gv,go x7zi::u+gmagnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of the contact f7ovg +we*lq ,yugz3kg xg:i/:orce on block C from block B?

  14.04: Three equal masses are suspended from a c:i; g(rdtz/eulassroom ceiling by a series of strings as shown in the figure. ru(zi;/d: gt eWhich string has the greatest tension?

  16.05: In the figure sho6vt/w80 bnhwk wn, the mass m = 6.0 k。and the mass M = 14.0 k。are stationary. Thewbnh68wtk/v 0 mass M rests 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 scientis) x*w5l 4xp/kfj xznj*ts is most associated with the following statemex)xf*4zp *nj/xwklj5 nt: “For small displacements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the:w ae5ozrk a-s;cr3x-r5i u+9dwu /s j accompanying figure, a force F is exerted at an angle of xuskir/ 93dca u5-eo:;sj zw+5 w-rar$\theta$. 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 o ij0a (u :3azy6j0jiqfloor at constant speed by means of a force P as shown to the rij60jjz 0(iaoay3i u:qght. Which of the following must be true?

  99.08: A weight can be hung in any of the following four ways. In which case(y(; ,nu0 ym 7sdsl*nr4boig j is the string most likely to briys sj(rnl*du(bgm7 y; 04,n oeak?

  96.39: Assume the obje-3f5cll 6z8mp yjj /oncts in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to 8 3lyp6n/jozmfc- j5l break?

  16.10: A person wishes to accelera i:h3s;jrwds7 te an object upward uniformly. Which one of the following choices must be true of the force F, provide7jhrw3:sis ;dd 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 the x-axis, at one instant of time, vpt.+oqnx:d0-nnz.qthe mass has position 2.0 m, velocity 3.0 m/s,and accel:qt.-v +ozpn.n0dxq neration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?

  11.15: A 4.0 kg object is r* iiqv1n4 gli+c p w6k5(vb vv2ba).ypushed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object accb52q4 1i ivv+b)p6v*yvw.rani(kclg elerates 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 rietv.mg8y 80 5 b z,nckj:hzkfb/ ioe58ght along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficie8zt/b h85 kvc0.i: kzjbof e,y m8n5egnt 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 of )yas (cps pp5c4-n y*r $30^{\circ}$ 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 platerh6.p3 j-cfo: tygf4)ztso s/ as shown in ttr./co-sfohy) p3ft4zj sg :6 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 mv:45g 1d fs4cwz id:zon an incline that makes the angle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes ofdwvs 5:c4gd4m:f1z iz the normal force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a:8jeh old1 ,et 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 f :qma: (lt7t0w g4wlqvky6x4is placed on a second plane (where friction is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of fricwy:4(xgvtlkq60 qf4a t7:lmwtion between the block and the second inclined plane?

  08.08: An object on an inclined plane has a gravitational forciijfyr0;7d ,s-z m 8rye 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 to the incline’s surface while the x-axis is parallelrjdi8y0rs;iz7f, y -m to the inclined surface.

  15.13: An object is being pushed at constant speed on ans 8sutdvvsvft.;(+w p / .8erj inclined plane. The free body diagram of the object is shown with the gravite.88(twtsf vdvjpus v.;r/ +sational 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 push.khm4f rz :e2ees a block of mass M=6.0 kg with a constant speed of 5.0 m/s straight up a flat surface inclin fe4:keh2m.rz ed $30^{\circ}$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 planet( xr:eoc1s,n- hyhcf up40c3k/ c7fl 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 60fyku o7l,ccsh3t1ce/hc f prx(n- :42 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 reliz d2s +z .tb/pg/cbg6eased 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 from the table on the inclin z/z.dbg/+sb2ic t 6gpe?