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3 years ago

I’m confused on the simplest part, which is what to multiply the 2/5 by to get it to the other side...please help

Physics

1 answer:

san4es73 [151]3 years ago

7 0

Answer:

Mass, M = 4.859 Kg

Explanation:

Given the following data;

Radius, r = 0.225 m

Moment of inertia, I = 0.123 kgm²

To find the mass;

Mathematically, the moment of inertia is given by the formula;

I = ⅖Mr²

Making M the subject of formula, we have;

Cross-multiplying, we have;

2I = Mr²

$M = \frac {2I}{r^{2}}$

Substituting into the formula, we have;

$M = \frac {2*0.123}{0.225^{2}}$

$M = \frac {0.246}{0.050625}$

Mass, M = 4.859 Kg

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