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IgorC [24]
3 years ago
8

Student swings a small rubber stopper attached to a string over her head in a horizontal, circular path. The string is 1.50 mete

rs in length and the rubber stopper makes 120 complete circles every minute.
Physics
1 answer:
harkovskaia [24]3 years ago
4 0

Answer:

v = 18.84 m/s

Explanation:

Given that,

The length of the string, r = 1.5 m (it will act as radius)

The rubber stopper makes 120 complete circles every minute.

Since, 1 minute = 60 seconds

It means, its frequency is 2 circles every second.

Let we need to find the average speed of the rubber stopper. It can be calculated as follows :

v=\dfrac{d}{T}

d is distance, d=2\pi r and 1/T = f (frequency)

v=2\pi rf\\\\=2\pi \times 1.5\times 2\\\\=18.84\ m/s

So, the average speed of the rubber stopper is 18.84 m/s.  

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