Arotating flywheel can be used as a method to store energy. if it is required that such a device be able to store up to a maximum of 1.00 ´ 106 j when rotating at 400 rad/s, what moment of inertia is required?

options:

1)

50 kg×m2

2)

25 kg×m2

3)

12.5 kg×m2

4)

6.3 kg×m2

5)

5.4 kg×m2

(3).I = 12.5 kg.m²

Explanation:

Given that

maximum stored energy E

E= 1 x 10⁶ J

Angular speed ,ω = 400 rad/s

We know that energy stored in flywheel given as

I=Moment of inertia of the flywheel

Now by putting the values

I = 12.5 kg.m²

Therefore the answer will be (3).

I = 12.5 kg.m²

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

pe = weightxheight = 2000x1000=2,000,000joules