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i need to figure out the distance travelled by a dragster, using the equation dv/dt=(10t^3)/3-30t^2+60t

 Jun 4, 2015

Best Answer 

 #1
avatar+33661 
+10

You can do this by integrating twice with respect to t:

 

acceleration: dv/dt = (10/3)t3 - 30t2 + 60t

 

velocity: v = ds/dt = (5/6)t4 - 10t3 + 30t2 + constant  where s is distance.  If we assume the velocity is zero when t = 0, then we just have:

ds/dt = (5/6)t4 - 10t3 + 30t2 

 

Integrate this:

distance: s = t5/6 - (5/2)t4 + 10t3 + constant.  If we assume distance is zero when t = 0, then

distance: s = t5/6 - (5/2)t4 + 10t3

.

 Jun 4, 2015
 #1
avatar+33661 
+10
Best Answer

You can do this by integrating twice with respect to t:

 

acceleration: dv/dt = (10/3)t3 - 30t2 + 60t

 

velocity: v = ds/dt = (5/6)t4 - 10t3 + 30t2 + constant  where s is distance.  If we assume the velocity is zero when t = 0, then we just have:

ds/dt = (5/6)t4 - 10t3 + 30t2 

 

Integrate this:

distance: s = t5/6 - (5/2)t4 + 10t3 + constant.  If we assume distance is zero when t = 0, then

distance: s = t5/6 - (5/2)t4 + 10t3

.

Alan Jun 4, 2015

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