Determine the rotation period of a disc with 2m radio , that

In summary, the rotation period of a disc can be determined by measuring the time it takes for one full rotation. This time is directly proportional to the disc's size, meaning a larger disc will have a longer rotation period. External factors and the disc's material can also affect the rotation period. The rotation period can be used to calculate angular velocity and has practical applications in engineering and astronomy.
  • #1
DexterV
2
0

Homework Statement


Determine the rotation period of a disc with 2m radio , that makes 20 rotations per minute.

Homework Equations

The Attempt at a Solution


I did T= 60/20 to find the period , but is that it ? what about the 2m?
 
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  • #2
Rotation period is the time taken for one complete rotation. You already know the time taken for 20 rotations( 1 min) , so it doesn't matter what radius it has , simply calculate time taken for one complete rotation.The answer is correct (60/20 = 3 seconds)
 
  • #3
thank you !
 

1. What is the rotation period of the disc?

The rotation period of a disc with a 2m radius can be determined by measuring the time it takes for one full rotation. This can be done using a stopwatch or by tracking a specific point on the disc as it rotates. The resulting time will be the rotation period in seconds.

2. How is the rotation period affected by the disc's size?

The rotation period of a disc is directly proportional to its size. This means that a larger disc will take longer to complete one full rotation compared to a smaller disc. The relationship between rotation period and size is linear, so doubling the size of the disc will double the rotation period.

3. Can the rotation period change over time?

Yes, the rotation period of a disc can change over time due to external factors such as friction, air resistance, and changes in the disc's mass distribution. These factors can slow down or speed up the rotation of the disc, resulting in a change in the rotation period.

4. Can the rotation period be affected by the disc's material?

Yes, the material of the disc can affect its rotation period. Materials with lower density, such as foam or plastic, will have a shorter rotation period compared to materials with higher density, such as metal or wood. This is because lower density materials are lighter and experience less resistance during rotation.

5. How can the rotation period of a disc be used in real-world applications?

The rotation period of a disc can be used to calculate its angular velocity, which is a crucial parameter in many engineering and physics applications. For example, in the design of rotating machinery, the rotation period helps determine the disc's stability and dynamic response. In astronomy, the rotation period of celestial bodies can provide valuable information about their composition and formation.

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