A cyclist travels at a constant speed of y k9+ufw9fsext+-h/ l$22.0 \mathrm{~km} / \mathrm{hr}$ 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 avemxef8a tb8 /:l bkj2:zrage acceleration during the ten second interval.

  Rank the magnitudes of the maximuy2-v2 w04) 5cldnn vppmi,w ldm velocity achieved during the ten second interval.5vvml 4yp2nilcwd2p,0 )-wdn

  Rank the magnitudes of the distance traveled during the teq9,lgyint; a my)n0z+n second interval.

  A crude approximation is that the Earth travels in a circular orbit about thqgq p)xx:y5ynm0k . 4lolm/ ;:*l chrwe Sun at constant speed, at a dily* / :)nwlm0lxo4x pm. cgk:5rqhyq; stance 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 control with velam3vx *vdlw. ro0) h1iocity $v_{\mathrm{c}}$ 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 an angulafpsolc +2y mng*1 *hu8r 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 weight of wd 6pee.5o wy-$30 \mathrm{~N}$ 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 lengths 3) dck*(iqmz o+skq1 of 2.0 meters and a spring constant of 10 newtons/meter. Alice is pulling on one end of the spring with a force of 3.0 newtons)qm1 s(c*+z dqki3 kos. Bob is pulling on the opposite end of the spring with a force of 3.0 newtons, in the opposite direction. What is the resulting length of the spring?

  Which of the following changes will result in :aahpn+m5,wtcs m +b4an increase in the period of a simb+,a5:mwtc4 pahn+msple pendulum?

  A large metal cylindrical cup floats in ach-d hmx. ybcgbn7g )/7)o, nk2o/gmb rectangular tub half-filled with water. The tap is placed over the cup and turned on, releasing wa-7yb)bb,/cghmgck ng) dmx/h2n 7 oo.ter at a constant rate. Eventually the cup sinks to the bottom and is completely submerged. Which of the following five graphs could represent the water level in the sink as a function of time?

  You are given a large collection of identical heavy balls and lightweight rod8tol -dz :a7zms. When two balls ar -alz8do7mzt: e placed at the ends of 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 diagr 5m** i31ys(ue3aeuol,eeey cam consists of a solid 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 wp ,7w.7-db)ucx4 x iaqbd q-joith weights tied at various point, all hanging from the ceiling, and reaching down to the floor. The string is released at the top, allowing the weights to fall. Which one will create a regularqu7c-4 axdx b-dij)w,7. obpq, uniform beating sound as the weights hit the floor?

  A vertical mass-spring oscillator isa7c(owfc r 7*xc 2vmr6 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 book to keel n)svxp5 ;-e0q:ie a;l5q3 gqqnxav6p the rope from slippinael li-n );qvx e6:q;va q5x5g0 nsq3pg?

  Jonathan applies a normal force thaaxem.6s uoe3 2;82mzcygbc3l t is just enough to keep the rope from slipping. Becky makes a small jump, barely leaving contact with the floor of the box. Upon landing on the box, the force of the impact causes t.eg263 meuo;xczcbyl 83 m2ashe 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 tvgm lph9 4;h yy3bh9:mhe origin?

  What is the maximum distance betw ptfa2xbao3ryz30.v) p-cq/ueen the particle and the origin?

  An engineer is given a fh3 p pt vy9:md5jl pdxm+;f/1bixed volume $V_{m}$ 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 hypothetical gasoline engine as a :pcx86w. k qs ui8+5aflqv4k zfunction of rota4 +vkq.aicf w8kpz6 8x5qs :ultion frequency. The engine is incapable of running outside of the graphed range.


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 pl2wm: qfnqez2bt9 1-jpanet at an angle to the vertical. The particle travels in the absence of air resistance and eventually falls back onto the planet. Spaceman Fred describes the q b1 neqz-m: p2jt92wfpath 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 oc otz 8:*+r5.qacoy dcf inner radius $R$ 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 toilet paper tube))tqcm(; vky qyp5e. +f and a block are placed at rest at the tope k.(yq v)yf;5 pctmq+ 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?