A cyclist travels at a constant speed o dkvu11rbr5iek50, ff f $22.0 \mathrm{~km} / \mathrm{hr}$ except for a 20 minute stop. The cyclists average speed was $17.5 \mathrm{~km} / \mathrm{hr}$. How far did the cyclist travel?

  Rank the magnitudes of the average acceleration during the ten second in3fv)zi gw/l1.dhx u o 77mdg/jterval.

  Rank the magnitudes of the maximum velocity achieved during the ten second ing sft97 np5;r bw8v;nftervt gw 78; vnf;n5b9frspal.

  Rank the magnitudes of the distance tra0;so56mwkeuuyhyxrh:b(2vt 5nq 5g ;veled during the ten second interval.

  A crude approximation is that the Earth travels in a circular4 rbsan.j -e9j orbit about the Sun at constant se nj.-4 r9bajspeed, at a distance of $150,000,000 \mathrm{~km}$ from the Sun. Which of the following is the closest for the acceleration of the Earth in this orbit?

  A child is sliding out of co hhn h s4j9v2sek8vv29ntrol with velocity $v_{\mathrm{c}}$ across a frozen lake. He runs head-on into another child, initially at rest, with 3 times the mass of the first child, who holds on so that the two now slide together. What is the velocity of the couple after the collision?

  An ice skater can rotate about a vertical axis with anj1zjpk jb45.r+a k +he angular velocity $\omega_{0}$ by holding her arms straight out. She can then pull in her arms close to her body so that her angular velocity changes to $2 \omega_{0}$, without the application of any external torque. What is the ratio of her final rotational kinetic energy to her initial rotational kinetic energy?

  When a block of wood with a ormv;:3w9 skvl)q1if weight of $30 \mathrm{~N}$ is completely submerged under water the buoyant force on the block of wood from the water is $50 \mathrm{~N}$. When the block is released it floats at the
surface. What fraction of the block will then be visible above the surface of the water when the block is floating?

  A spring has an equilibrium length of 2.0 meters and a sxiy*;m79 tg:dv;zr q5;pn yjrmt2k 2bpring constant of 10 newtons/meter. Alice is pulling on one end of the spring with a force of 3.0 newtons. Bob is pulling on the opposite end of the spring with a force of 3.0 newtons, in the opv9jkbpntm;rtq7 ;i 5 zyg m:*2d;rx2yposite direction. What is the resulting length of the spring?

  Which of the following chang1-i0poadcepj f c8o +ttr-x1 2es will result in an increase in the period of a simple1ia12petpj-0c8dc rtf +xoo- pendulum?

  A large metal cylindrical cup floats in 9; cyrfr 0m+(5laziai a rectangular tub half-filled with water. The tap is placed over the cup and turned on, releasing water at a constant rate. Eventually the cup sinks to the bottom and is completely submerged. Which of the following five graphs could represent thi0zc5 fy aa;i+9m( lrre water level in the sink as a function of time?

  You are given a large collection of identical heavy balls and lightweightxw m3k-u 8.qne rods. When two balls are placed at the ends om n 8q3x.-ewukf one rod and interact through their mutual gravitational attraction (as is shown on the left), the compressive force in the rod is $F$. Next, three balls and three rods are placed at the vertexes and edges of an equilateral triangle (as is shown on the right). What is the compressive force in each rod in the latter case?

  The apparatus in the diagram consists of a soloz /w4,*bl 1s 5ywsibfid cylinder of radius $1 \mathrm{~cm}$ attached at the center to two disks of radius $2 \mathrm{~cm}$. It is placed on a surface where it can roll, but will not slip. A thread is wound around the central cylinder. When the thread is pulled at the angle $\theta=90^{\circ}$ to the horizontal (directly up), the apparatus rolls to the right. Which below is the largest value of $\theta$ for which it will not roll to the right when pulling on the thread?

  You have 5 different strings with weighnzc5q nrms:7(-;*8 fs-y s th kfwvb-kts tied at various point, all hanging from the ceiling, and reaching down to the floor. The string is released at the top, allowing the weigs:q(*z kytvbh-wsm s-f;5ck -rnnf8 7hts to fall. Which one will create a regular, uniform beating sound as the weights hit the floor?

  A vertical mass-spring oscillator ish j83 b9. q .rn+gtv3zwd6hosg displaced $2.0 \mathrm{~cm}$ from equilibrium. The $100 \mathrm{~g}$ mass passes through the equilibrium point with a speed of $0.75 \mathrm{~m} / \mathrm{s}$. What is the spring constant of the spring?

  What magnitude force does Jonathan need to exert on the physics b ay(e2vhw*g 2nook to keep the rope from slippingygvhw en(22*a ?

  Jonathan applies a normadf6 d44 iywst7q.gik*l force that is just enough to keep the rope from slipping. Becky * 4kgdis 76wy tfd.4iqmakes a small jump, barely leaving contact with the floor of the box. Upon landing on the box, the force of the impact causes the rope to start slipping from Jonathans hand. At what speed does the box smash into the ground? Assume Jonathans normal force does not change.

  A block of mass $m=3.0 \mathrm{~kg}$ slides down one ramp, and then up a second ramp. The coefficient of kinetic friction between the block and each ramp is $\mu_{\mathrm{k}}=0.40$. The block begins at a height $\mathrm{h}_{1}=1.0 \mathrm{~m}$ above the horizontal. Both ramps are at a $30^{\circ}$ incline above the horizontal. To what height above the horizontal does the block rise on the second ramp?

  After how much time will the particle first return to the orihx1 e5kulq (+/ 2sldyugin?

  What is the maximum distance between the partiza6 2iuc5f+vzcle and the origin?

  An engineer is given a fixed v ;duaj1 bfk,udyl *4g9olume $V_{m}$ of metal with which to construct a spherical pressure vessel. Interestingly, assuming the vessel has thin walls and is always pressurized to near its bursting point, the amount of gas the vessel can contain, $n$ (measured in moles), does not depend on the radius $r$ of the vessel; instead it depends only on $V_{m}$ (measured in $\mathrm{m}^{3}$ ), the temperature $T$ (measured in $\mathrm{K}$ ), the ideal gas constant $R$ (measured in $\mathrm{J} /(\mathrm{K} \cdot \mathrm{mol})$ ), and the
tensile strength of the metal $\sigma$ (measured in $\mathrm{N} / \mathrm{m}^{2}$ ). Which of the following gives $n$ in terms of these parameters?

  This graph depicts the torque output of a ho un . ;aaix..l79zoikypothetical gasoline engine as a function of rotation frequency. The engine is incapable of running outside of the graphed range.;naozak.. i 7o.u9xi l


At what engine RPM (revolutions per minute) does the engine produce maximum power?

  A particle is launched from the surface of a uniform, stationary spherical pe t92y apf ; 7jhr9fb nznhmg3*/i0jk+lanet at an angle to the vertical. The particle travels in the absence of air resistance and eventually falls back onto the planet. Spa2;kfzemni309jf yjb*r+7tnha 9 ghp / ceman Fred describes the path of the particle as a parabola using the laws of projectile motion. Spacewoman Kate recalls from Keplers laws that every bound orbit
around a point mass is an ellipse (or circle), and that the gravitation due to a uniform sphere is identical to that of a point mass. Which of the following best explains the discrepancy?

  A turntable is supported on a Teflon ring of inner radiusnvzacm4bver;967rww9 4 ;zi w $R$ and outer radius $R+\sigma(\sigma << R)$, as shown in the diagram. To rotate the turntable at a constant rate, power must be supplied to overcome friction. The manufacturer of the turntable wishes to reduce the power required without changing the rotation rate, the weight of the turntable, or the coefficient of friction of the Teflon surface. Engineers propose two solutions: increasing the width of the bearing (increasing $\sigma$ ), or increasing the radius (increasing $R$ ). What are the effects of these proposed changes?

  A hollow cylinder with a very thin wall (like a l 2vb2uu:wfs0 toilet paper tube) and a block are placed uwv 2 s:l2fu0bat rest at the top of a plane with inclination $\theta$ above the horizontal. The cylinder rolls down the plane without slipping and the block slides down the plane; it is found that both objects reach the bottom of the plane simultaneously. What is the coefficient of kinetic friction between the block and the plane?