A cyclist travels at a constant spee9/ megsbc nsj-fwb 80(d of $22.0 \mathrm{~km} / \mathrm{hr}$ 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 interqknl:6ns0 ;,fa a;wfwval.

  Rank the magnitudes of the maximum velocity achieved during1p e o87q j(be( vskz4fo:g.uw the ten second intervalb gu(4 jo:keqv8fswpzo.17(e.

  Rank the magnitudes of the dg3okyc.mir rtq 37/at:5 zv 7pistance traveled during the ten second interval.

  A crude approximation is that the;oie+ xsuv/:b Earth travels in a circular orbit about the Sun at constant speed, at a distance of;:s+xuobe /v i $150,000,000 \mathrm{~km}$ from the Sun. Which of the following is the closest for the acceleration of the Earth in this orbit?

  A child is sliding oudx;h3 bjea( 2vp6hkzv vp8+v8 t of control 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 an ah7,v t/qwy+a634wa swfr 3ddmmsz :x9ngular 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 a3pngxuq67m l oq3:+dl6a 0 cvf 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 sqsag/x/74 rb2.0 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. Bob is pulling on the opposite end of the spring with a force of 3.0 newtons, in the oppo7 a/ rx4s/bgqssite direction. What is the resulting length of the spring?

  Which of the following changes will result in an increase in the period of a si-zha; pj36e-7qdmschtgy8 mndf3 .q4 m3zc6nma;. efjqm4 pg8h--s hd7dytq3 ple pendulum?

  A large metal cylindrical cup floats in a rectany j04 oox2j+gx7ryod1d - ame(gular 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 ofrd4ag xjemd2xyj-o(7y o+0 1 o 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 eaey td:r l(1:rods. When two balls are placed at the ends of one rod and interact through their mutual gravitational attraction (as is shown on the leftt(r :eae y:dl1), 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 suzqjb-:k :d-wolid 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 wit thc, 8ltpm:1ph 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 regular, uniform beating sound as the weightph ,m8tcl 1tp:s hit the floor?

  A vertical mass-spring oscillator is displaced ) jngun f0 ozuqp*3oati3t35 )$2.0 \mathrm{~cm}$ 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 Jonath)yja+a rzbu 3(j zq)6ran need to exert on the physics book to keep the r+qzry3auz)j )rb(a6j ope from slipping?

  Jonathan applies a normal forc9guyh .7x 7drki t xm(z n:q.prl0h;u*e that is just enough to keep the rope from slipping. Becky makes a small jump, barely leavp.g zn9yuk*: (;7hr.7i0utrmhl q xdxing 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 firs33 xg pr54h(pts(usbbt return to the origin?

  What is the maximum distance between te w:d r dg/ip,ih-0a1lp o:(jmhe particle and the origin?

  An engineer is given a fixedd mp:2l ,vvo.5q;cr ar 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 outpui65p( ed,vg;mjb /m8exs8ny3iuy 2fut of a hypothetical gasoline engine as a function of rotation frequency. The engine is incapable of running outside of ti65x u8yg; ,bj/(m esmepv f 3in8yud2he 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 px8-q; e7tggy a/+z:)azuh nhtlanet 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 path of the particle as a parabola x:nah ezt g)hz8/a+q t 7gyu-;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 Tefloc1 ue8imu11aon ring of 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 p.wqm- 9zrl :-egw 8sivot3sl )aper tube) and a block are placed at rest at the top of a plane witlvle8 s-wz:qti 9g-.w3r) mso h 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?