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Gnoma [55]
3 years ago
8

The number of revolutions of two pulleys is inversely proportional to their diameters. If a 24-inch diameter pulley making 400 r

evolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.
133 1/3
800
1,200 ...?
Physics
2 answers:
bixtya [17]3 years ago
8 0
The correct answer is 1200.
nalin [4]3 years ago
3 0
<h3><u>Answer;</u></h3>

1200

<h3><u>Explanation;</u></h3>
  • Since diameter (d) is inversely proportional to the revolutions (n) are

<em>Then; dn=k  </em>

We can use the relationship to find the unknown, k:  

<em>k = dn  </em>

<em>k = (24)(400) = 9600  </em>

Then use k to find the unknown n:  

<em> k= dn  </em>

<em>9600 = 8n  </em>

<em>n = 1200  </em>

<u> = 200 rpm</u>

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