07.10: Contact forces are examples of which of the fundamental foeu2)*4df 0wa5cs.xig okdh b 5rces?

  99.02: Which of the foll 0b(g kp2uoeiz/ 5cws8owing terms is NOT related conceptually to the others?

  02.20: The graph shows the relationship between the mass of a number of rubber 5 x(5 moyzmir4stoppers and their resulting weight on some far-off planet. The slope of the graph is a represe zr5m4ioy(5xm ntation of the:

  10.15: Three blocks, labeled A,B, and C, remain at rest on a table. Thepqx (1a2yyp( w magnitude of the gravitational force on each block is indicated on the figure. What is the magnip (q(apyw21xy tude of the contact force on block C from block B?

  14.04: Three equal masses are suspended from a classj7190n r-n b./x izn)ebakji c-r ro0xroom ceiling by a series of strings as shown in the figure. Which strine0/j) 1nox i9ja0cr z-xk7bb-ri nr.ng has the greatest tension?

  16.05: In the figure shown, the mass m = 6.0 k。and i6-.he5u e pw9:y gclythe mass M = 14.0 k。are stationary. The mass M rests on the floor. Which one ou6i.-lcew heg:py 59yf the following choices represents the tension in the string connecting the masses?

  14.13: Which one of the following scienw6grjmzo 8r x46d+q)o7woy i.tists is most associated with the following statement: “For small displac+ oz6ox7im)wjdgwq r8ryo6.4 ements of an object from equilibrium, there is a restoring force that is proportional to the displacement.”?

  94.26: As shown in the /pc9,fszli;gg g+ f:u accompanying figure, a force F is exerted at an angle of gzpg+u /i:fl;,fg 9cs$\theta$. 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 fhq1:4ts8bbolw t6 fp*loor at constant speed by means of a force P as shown to the right. Whisotb6wf8:p q1bt4* hlch of the following must be true?

  99.08: A weight can be hug eig5r1j2ul ,ng in any of the following four ways. In which case is the string me 1g,ug2ilr5j ost likely to break?

  96.39: Assume the objects in the following diagrams have equal mass and the 4ro2,:upmazs strings holding them in place o :pam,4su2rzare identical. In which case would the string be most likely to break?

  16.10: A person wishes to accelerate an objec zn tnbs3z/(u4t upward uniformly. 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. Ignore any et z4nuz /n3s(bffects of the air or of the Earth’srotation.

  11.12: A 5.0 kg mass moves alon9njyilr2 ws;hmc9b.2 g the x-axis, at one instant of time, the mass has position 2.0 m, velocity 3.sjcm2 .;2i9bhnylrw 90 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 pushqfm50 okjc vcg-ekpvw9 o(08) ed to the right on a rough surface by a horizontal force of 15 N as shown, during the push, the object ac(-0jvge vcqok o 09)fkc5m 8pwcelerates 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 slid+zp :o 1) aiupf7t2 0uq-xpemu)rvbg -ing to the right along the floor. A horizontal force of 10.0 N is being applied to the+1pmg0uzp-qru 2fu v7ai p)bto-:ex) 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 n5 3c mstf5ikxg.jnxxfg)/(; 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 horizontal steel plate as kyrg+n5wh+,te:e9 / 4zdpmop. lnmn -shown in the diagram A g,h tnpo4n/+kn zwydlr:9e.em +-5pm.
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 *3*zjz7rs o dpθ with the horizontal. The block remains at rest as θ is slowly increased. The magnitudes of the norma 3z*ojrd *pzs7l force and the static frictional force of the incline on the block

  01.11: A 5 kg block rests on a flat plane inclined atmjp)1ufd: m,w 7j:o4f i), inwo cxs+g 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 signifim:+e-jwx o g,qcant) 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 the second inclined plq , +gjm-:owxeane?

  08.08: An object on an inclined plane ha 7:orh:5u 0y-l65pmvdhhde( rgf-u7*eqmy q vs 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 perpendguo:-y(-rm6uq0 h f hv7 yeh7d 5:dpr5 vqeml*icular to the incline’s surface while the x-axis is parallel to the inclined surface.

  15.13: An object is becfw 9g)c irx*2ing pushed 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 corrx c *2grfc9iw)ect relationships between

  08.20: A person pushes a block of mass M=6.0 kg with a constant speed of j .s+ +5ezq96mydqomww(qh b.5.0 m/s straight up a flat surfaco +(j wqmy.dw9q6zb q+.mhe5s e 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 . /x7a0 dck/ fjy *q2e-tebo.to 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 2tyteb*./ jcked ax f-/70 qoothe block?

  17.40: A small object of mass M is released from rest at the top of a frictil,. c3ee sn.(txsf yp7onless 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 thn syc,fe..lx e73t (pse normal force from the table on the incline?