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A water wheel with diameter 3 m is used to measure the approximate speed of the water in a river. If the angular velocity of the wheel is 15 rpm, what is the speed of the river, in kilometres per hour?

 May 12, 2015

Best Answer 

 #1
avatar+27310 
+15

linear velocity = circumferential distance*number of revolutions per minute so:

linear velocity = 15*pi*3 metres/minute = (15*pi*3/1000)*60 km/hour

 

You can crunch the numbers.

.

 May 12, 2015
 #1
avatar+27310 
+15
Best Answer

linear velocity = circumferential distance*number of revolutions per minute so:

linear velocity = 15*pi*3 metres/minute = (15*pi*3/1000)*60 km/hour

 

You can crunch the numbers.

.

Alan May 12, 2015
 #2
avatar+94976 
0

Thanks Alan,

This would be a really nice one for Zac (or somene else) to explain in detail.

Where is Zac when we need him. Any other takers?  LOL

 May 12, 2015

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