Differences

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--- 183_notes:examples:a_meter_stick_on_the_ice [2014/11/16 21:37] – pwirving
+++ 183_notes:examples:a_meter_stick_on_the_ice [2014/11/20 16:00] – pwirving
@@ Line 6: / Line 6: @@
 === Facts ===
+Mass of meter stick 300g
+Pull at end of meter stick at right angles to the stick: 6N
+Remember a meter stick is a meter long
@@ Line 13: / Line 16: @@
 === Lacking ===
+Rate of change of the center-of-mass speed $v_{CM}$?
+Rate of change of the angular speed $\omega$?
 === Approximations & Assumptions ===
+No friction due to ice
@@ Line 27: / Line 33: @@
 Surroundings: Your hand (pulling); ice (negligible effect)
-{{course_planning:projects:mi3e_11-006.jpg?400}}
+{{183_projects:mi3e_11-050.jpg?300}}
-$d\vec{P}/dt = d(m\vec{v}_{CM})/dt = \vec{F}_{net}$
+$\frac{d\vec{P}}{dt}$ = $\vec{F}_{net}$
+$\frac{d\vec{L}_{rot}}{dt}$ = $\vec{\tau}_{net,CM}$
+$\tau = r_{A}Fsin \theta$
@@ Line 52: / Line 62: @@
 $d\omega/dt = (3N \cdot m)/[(0.3 kg \cdot m^2)/12] = 120 radians/s^2$
-In vector terms, d\vec{\omega}/dt points into the page, corresponding to the fact that the angular velocity points into the page and is increasing.
+In vector terms, $d\vec{\omega}/dt$ points into the page, corresponding to the fact that the angular velocity points into the page and is increasing.