<p>Any links to old free response sections for practice?</p>
<p>I received a whole packet of free response questions on friction problems. Would you like to try them for practice?</p>
<p>I would !!!!!!!!!!!!!!!</p>
<p>Alright, just give me a minute, I'll pick out a few and type them up.</p>
<p>Just PM .................</p>
<ol>
<li><p>Drag race tires in contact with an asphalt surface probably have one of the highest coefficients of static friction in the everyday world. Acceleration and no slipping of tires, estimate the coefficient of static friction for a drag racer that covers the quarter mile in 6.0 s.</p></li>
<li><p>A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.20 and the push imparts an initial speed of 4.0 m/s?</p></li>
<li><p>Two crates, of mass 75 kg and 110 kg, are in contact and at rest on a horizontal surface. A 730-N force is exerted on the 75-kg crate, If the coefficient of kinetic friction is 0.15, calculate (a) the acceleration of the system, and (b) the force that each crate exerts on the other.</p></li>
<li><p>(a) Show that the minimum stopping distance for an automobile traveling at speed v is equal (v^2)/(2<em>CSF</em>g), where the CSF is between the tires and the road, and g is the acceleration of gravity. (b) What is this distance for a 1200-kg car traveling 95 km/h if CSF=0.75? (c) What would it be if the car were on the Moon but all else stayed the same?</p></li>
</ol>
<p>(Note: CSF is "coefficient of static friction". I couldn't make that symbol.)</p>
<ol>
<li><p>A flatbed truck is carrying a heavy crate. The coefficient of static friction between the crate and the bed of the truck is 0.75. What is the maximum rate at which the driver can decelerate and still avoid having the crate slide against the cab?</p></li>
<li><p>On an icy day, you worry about parking your car in your driveway, which has an incline of 12 degrees. Your neighbor Ralph's driveway has an incline of 9.0 degrees, and Bonnie's driveway across the street has one of 6.0 degrees. The coefficient of static friction between tire rubber and ice is 0.15. Which driveway(s) will be safe to park in?</p></li>
<li><p>A child slides down a slide with a 28 degrees incline, and at the bottom her speed is precisely half what it would havebeen if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.</p></li>
<li><p>A coffee cup on the dashboard of a car slides forward on the dash when the driver decelerates from 40 km/h to rest in 3.5 s or less, but not if he decelerates in a longer time. What is the coefficient of static friction between the cup and the dash?</p></li>
</ol>
<p>anyone can do these?</p>