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aliina [53]
3 years ago
6

How is a flywheel constructed to maximize its rotational inertia?

Physics
1 answer:
BigorU [14]3 years ago
6 0

Answer:

It is constructed with a high mass and a high raidus.

Explanation:

The rotational inertia I for every object is calculated as:

cMR^2 = I

where c is a constant, M is the mass of the object and R the radius of the object.

So, for a flywheel, the rotational inertia is calculated as:

I = \frac{1}{2}MR^2

Then, for constructed a flywheel with the maximun rotational inertia we have to set the maximum mass and the maximun radius.

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A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose
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Answer:

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Explanation:

Given:

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<u>Now since the bullet-mass gets embed into the block, we apply the conservation of momentum as:</u>

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Now this kinetic energy of the combined mass gets converted into potential energy of the spring.

\rm Kinetic\ energy=Spring\ potential\ energy

\frac{1}{2} (M+m).v^2=\frac{1}{2} k.x^2

\frac{1}{2} \times (2+0.01)\times 1.4925^2=\frac{1}{2} \times 19.6\times x^2

x=0.478\ m is the compression in the spring

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