07.10: Contact forces are examples of which of the fundamentall0-m2wk ivsbs+s)(,b ig wl m6 forces?

  99.02: Which of the following tjiqi306 t1c rxerms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a numm o/cc3o1t0t) n+djvgbr:z -s ber of rubber stoppers and their resulting weight on some far-off pljvdoc:nrm-/zstt+g 3c )1b 0oanet. The slope of the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain a1l4nt5dyp c ,pk9) llqt rest on a table. The magnitude of the gravitational force on each block is indicated on the figure. What is the magnitude of thek5n 4 pll lq,p1ydt)9c contact force on block C from block B?

  14.04: Three equal masses are suspended from a classroom ceiling by nrdp 66jhb l*r,)g3tma series of strings as shown in the figure. Which)nlm63r dh,* grjtb6p string has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0/ q4r*xcm;a pn k。and the mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one of the followx*m/ pn 4carq;ing choices represents the tension in the string connecting the masses?

  14.13: Which one of t2).skelw0sdohj zk 4j;g w 9m1he following 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 dilsokk d w910.mwejz24;j shg)splacement.”?

  94.26: As shown in the accomprtykc v,-r5wq ng+4f +anying figure, a force F is exerted at an angle of fc4+ w q,y-5vkn+ tgrr$\theta$. 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*w t(uq(u da/q constant speed by means of a force P as shown to th((/*u q wauqdte right. Which of the following must be true?

  99.08: A weight can be hung in gb zbuyp)rzm032 k(nu 41l5zpj -,dzj7 p6zleany of the following four ways. In which case is the string most likely to be7p1 z(m)y4 ljn,jl p0 6d 5 zbpkg3zz-ru2uzbreak?

  96.39: Assume the objects in the follopogpw6d8 5ep 37icr +wwing diagrams have equal mass and the strings holding them in place are identical. In which case woulpw re wp6ogp7ci58d+3d the string be most likely to break?

  16.10: A person wishes to accelerate an object upward unif yc k.4x6pt-yiormly. 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. I6tcxy. yk-ip4gnore any effects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves along the x-axis, pay( 1sf ;2olzat one instant of time, the mass has position 2.0 m, velocityzalf( 1yp ;2os 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 tz/)wc9dwo nk *he right on a rough surface by a horizontal force of 15 N as shown, during the push, wz *9dc /wkno)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 figur bsia 2od0rj45e to the right is sliding to the right along 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 floordrbsao2j5 i40 is 0.20. The box is moving with:

  00.32: A block rests 9lx 1;m1d;nrzt x,w xxtxcc*:on 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 horizmz3urq-g)e9 8mf b0 n*vswbqiwb 6g6 4ontal steel plate as shown in the diagram Ag* z)6me-qiqf nrg b6b93mv0b8uws4 w.
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 the angle θ with tsb 7 zw,r.5) k3lubebphe horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normalzb5k,7b)sb er.3w u pl force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined at an angle d) d9vsssc7y8 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 sighch: .,2obu*f fi j)wnnificant) in inclined at the same angle, it wilcuhj w.bf,f2on )h*:i l 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 inclinie.o5f077 d/9+zh jy,;a l oc rgvkogved plane has a gravitational 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 to the incline’sdz0k 5.or ,; vh7oi7ag /+cofgyeljv9 surface while the x-axis is parallel to the inclined surface.

  15.13: An object is being pushed at constant speed on an inclined planopy:6 ws)77gddu l-oms+: pkanew g25e. The free body diagram of the object is shown with the s ygd:n)pds oe:uk 6wl+p-g5w7o 72amgravitational 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 . k8xnal6j:c lkg with a constant speed of 5.0 m/s straight up lxj:nl86k ac. 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 ofh0lk-ew s. h)x 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 62 h0x.h -l wesk)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 relw9l-iqrxku2 h05oa9 )s.:ft - gpvg fleased 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,x90-ut-9r l2 psgviwgkfl. hq f5:ao) what is the magnitude of the normal force from the table on the incline?