qu.1.topic=<strong>Ch 8</strong>, <font size="-1"><strong>Sec 1</strong></font> - Conservative and Nonconservative Forces@

qu.1.1.mode=Randomized Formula@
qu.1.1.editing=useHTML@
qu.1.1.name=mg@
qu.1.1.question=What is the magnitude of work done by the gravitational force if a $m-kg body moves from $point_to_point along path $path? Suppose that <i>a</i> = $a m, <i>b</i> = $b m, <i>c</i> = $c m, and <i>d</i>= $d m.
<p align=center>
<img src="http://physics.unl.edu/directory/lee/edu/physics/graphics/ch8/sec1/qu1-1.gif">
</p>@
qu.1.1.answer=$ans J (1 ? 0.1)@
qu.1.1.random=
		$integer\=rint(6);
		$point_to_point\=switch($integer,"point <b>B</b> to point <b>A</b>","point <b>A</b> to point <b>B</b>","point <b>A</b> to point <b>C</b>","point <b>C</b> to point <b>A</b>","point <b>C</b> to point <b>D</b>","point <b>D</b> to point <b>C</b>");
		$path\=switch($integer,"<b><font color=red>2</font></b>","<b><font color=red>2</font></b>","<b>1</b>","<b>1</b>","<b><font color=green>3</font></b>","<b><font color=green>3</font></b>");
		$k\=rand(0.2,0.7,3);
		$k1\=rand(0.2,0.7,3);
		$a\=rand(2,4,3);
		$b\=sig(3,$a*(1+$k));
		$c\=rand(3,6,3);
		$d\=sig(3,$c*(1+$k1));
		$ans1\=switch($integer,$d,$d,$d,$d,$c+$d,$c+$d);
		$m\=rand(1,6,3);
		$ans\=sig(3,9.8*$m*$ans1)@

qu.2.topic=<strong>Ch 8</strong>, <font size="-1"><strong>Sec 2</strong></font> - Potential Energy and the Work Done by Conservative Forces@

qu.2.1.mode=Randomized Formula@
qu.2.1.editing=useHTML@
qu.2.1.name=Change in Potential Energy@
qu.2.1.question=Find the magnitude of the change of gravitational potential energy when a $m-kg body is thrown vertically upwards to $h m above its initial height.@
qu.2.1.answer=$ans J (1 ? 0.05)@
qu.2.1.random=
		$m\=rand(1,10,3);
		$h\=rand(2,15,3);
		$ans\=sig(3,9.8*$m*$h)@

qu.3.topic=<strong>Ch 8</strong>, <font size="-1"><strong>Sec 3</strong></font> - Conservation of Mechanical Energy@

qu.3.1.mode=Randomized Formula@
qu.3.1.editing=useHTML@
qu.3.1.name=Falling Box@
qu.3.1.question=A block of mass <i>m</i> = $m kg is released from a certain height and is falling toward an uncompressed spring.  Find the compression of the spring if <font face=symbol>D</font><i>h</i> = $dh m and the force constant of the spring is $k N/m.
<p align=center>
<img src="http://physics.unl.edu/directory/lee/edu/physics/graphics/ch8/sec3/qu1-1.gif">
</p>@
qu.3.1.answer=$ans m (1 ? 0.05)@
qu.3.1.random=
		$m\=rand(0.5,2,3);
		$dh\=rand(0.3,0.9,3);
		$k\=rand(400,900,3);
		$ans\=sig(3,(2*$m*9.8*$dh/$k)^(1/2))@

qu.4.topic=<strong>Ch 8</strong>, <font size="-1"><strong>Sec 4</strong></font> - Work Done by Nonconservative forces@

qu.4.1.mode=Randomized Formula@
qu.4.1.editing=useHTML@
qu.4.1.name=Work by Frictional Force@
qu.4.1.question=Sliding on a rough surface, a $m-kg body decelerates from $v_init m/s to $v_final m/s. What is the work done by the frictional force?@
qu.4.1.answer=$ans J (1 ? 0.05)@
qu.4.1.random=
		$m\=rand(1,5,3);
		$k\=rand(0.5,1.9);
		$v_final\=rand(3,5,3);
		$v_init\=sig(3,$v_final*(1+$k));
		$ans\=sig(3,0.5*$m*(($v_init)^2-($v_final)^2))@

qu.5.topic=<strong>Ch 8</strong>, <font size="-1"><strong>Sec 5</strong></font> - Potential Energy Curves and Equipotentials@

qu.5.1.mode=randomized formula@
qu.5.1.editing=useHTML@
qu.5.1.name=U(x) vs. x - Determine Speed@
qu.5.1.question=A moving $m-kg body generates the <i>U(x)</i> graph shown below. Knowing that the body starts at rest, find its speed at point $point.
<p align=center>
<img src="http://physics.unl.edu/directory/lee/edu/physics/graphics/ch8/sec5/qu1-1.gif">
</p>@
qu.5.1.answer=$ans m/s (1 ? 0.1)@
qu.5.1.random=
		$integer\=rint(7);
		$m\=rand(5,10,3);
		$point\=switch($integer,"<b>A</b>","<b>B</b>","<b>C</b>","<b>D</b>","<b>E</b>","<b>F</b>","<b>G</b>");
		$ans1\=switch($integer,0,5,9.5,5,14,17.6,0);
		$ans\=sig(3,(2*$ans1/$m)^(1/2))@