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Helen [10]
3 years ago
9

A sock with a mass of 0.03 kg is stuck to the inside of a clothes dryer spins

Physics
1 answer:
ValentinkaMS [17]3 years ago
5 0

Answer:

15.71 m/s

Explanation:

We are given;

Time; t = 0.2 s

Radius; r = 0.5 m

The circumference will give us the distance covered.

Formula for circumference is 2πr

Thus; Distance = 2πr = 2 × π × 0.5 = π

Linear speed = distance/time = π/0.2 = 15.71 m/s

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If you notice the units do not match. Before we can do anything else, we need to make the figures match. 

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But wait! If you think about the scenario, you are looking for how long it will take for the ball to reach the bat. The most applicable unit of time to use here is second. It would be very hard to really measure a short and instantaneous event in hours. So we convert it into feet per second: 

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So now we have our new given as:

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The formula for time can be derived from the formula from velocity, which is:
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All you need to do is plug in what you know and solve for what you don't know. 

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