07.10: Contact forces are examples w5.k: qne; xzxt)z q7xof which of the fundamental forces?

  99.02: Which of the following terms is NOT related conceptually to )hmm* xma+3 uwn2rvj9the others?

  02.20: The graph shows the relatio;2 biu+8laq:lvy /mej(2w *n ;hevs dsnship between the mass of a number of rubber stoppers and their resulting weight on some far-off planet. The slope of eban/q 8v2;(j *2w+ivls:s d lehuy;m the graph is a representation of the:

  10.15: Three blocks, labeled A,B, and C, remain at qbo+x mg*s( /frest on a table. The magnitude of tm*+og/ x(fb sqhe gravitational force 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 are suspended from a classg: a)* /tx/fuk2akqglqiw )w.room ceiling by a series of strings as shown in the figure. Which string has the greatest ten2akfk )qxgl /it). u:/gwwq* asion?

  16.05: In the figure shown, the mass m = 6.0 k。and the m cn;5u:p1jzvr1 a :dqo zom7,pass M = 14.0 k。are station1:vm a1zp;njp qcu,7 5zo:rdoary. The 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 scientists is mop )s+k44 ei3vsm,noc dst associated with the following statement: “For small displacements of an object from equilibrium, the+4 3)vnm4kopss dice ,re is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the accomp*u* v,.ug yvg+u0j q0x6pebslanying figure, a force F is exerted at an angle of bluy0p.x*6vq g esju,gu+ *v 0$\theta$. 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 woodele u ,fsunp ch6g9nu4k+3 h78sn box along a rough horizontal floor at constant speed by means of a force P as se3 un h9+uskn4c7fl h g,u8p6shown to the right. Which of the following must be true?

  99.08: A weight can be hung in any of40/bivod wbl,d+8,lmy pu8 hv the following four ways. In which case is the string most likely t+ 0d/l,yi v 4bu8h8, wmdblvopo break?

  96.39: Assume the objects in the following diagraef3x : pjr9/idms have equal mass and the strings holding them in place are identical. In which case would the st9:idjx3f per/ring be most likely to break?

  16.10: A person wishes to accelerate an objecmz6) opp sl*t4t upward uniformly. Which one of the following choices 6z *) 4ltpopmsmust 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’srotation.

  11.12: A 5.0 kg mass m:yv qgo nr*yv4+y6yz -oves along the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.0 m/s,a qz yyyo*yv6 +-gvnr:4nd 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 oj/;lbmp8n; ; qb*xql mn a rough surface by a horizontal force bp/mml* j q ;;l8qnxb; of 15 N as 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 i sxv0kd3lez7vn;/*/9r g jwe ,p9qjmgs 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 betsw,zd* gvpm9qlek3r g/n ;9j0 jv /e7xween 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 ang vyr+,g 8solkx j1g4k*le 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;;i zg5 d5 pubsv,r;hhn in the dia, ;dv;s55hr bzhg;iu pgram 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 incline that makes the aq7 otu2u28515s6eyqcl wvdjhc-c j0r ngle θ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the normal force and tsuj6t2uwl18 jq 2e d h5yrqc oc0c57v-he static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat placajpwp( 3 hi(lnd upzf;q*9( :ne 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 friction *pir5fso*ur.bavp gf 7 a9b:* is significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of friction betwi . rpr bfu*f5p7gbova :9as**een the block and the second inclined plane?

  08.08: An object on an inclined plane has a gruhpl qpr5 ir1f:5n0)m avitational 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 fiu05i1nlq pmf5rr h: )pgure? 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 pushyeljx:5 dqeya, 0mv4 )ed at constant speed on an inclined plane. The 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 to the incline by F, and the normal force with the surface by n. Which one of the following choices represents correx,)qvdm :le04 5yjyaect relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant sp1/. nerf0r/4bgkgu vteed of 5.0 m/s straight up a flat surfacvr b/k4e0g1 /gnu. trfe 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 incl t x8hrtu6rx79ined plane 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 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 t87 6rh9xurxt?

  17.40: A small object of mass M is released from rest at the top of a frictic 25cy:(kftmu + 4ro;evyi wb9onless incline. The inclinehas a mass M and makes an angle θ with tcrft+y k ;wy:civ9m 5o2u4b(ehe 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?