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alexgriva [62]
3 years ago
8

I'm not sure what to use help me please

Physics
1 answer:
DaniilM [7]3 years ago
5 0

Answer:

Mass of the ring is 2.5 kg.

Given:

Moment of inertia of a ring = 0.4 kg.m^{2}

Radius = 40 cm = 0.4 m

To find:

Mass of the ring = ?

Formula used:

I = m r^{2}

Where I = moment of inertia

r = radius of the ring

m = mass of the ring

Solution:

Moment of inertia of a ring is given by,

I = m r^{2}

Where I = moment of inertia

r = radius of the ring

m = mass of the ring

0.4 = m ×0.4×0.4

m = 0.4/(0.4×0.4)

m = 1/0.4

m = 2.5 kg

Mass of the ring is 2.5 kg.

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the negative sign indicates that the direction of the gases is opposite to the direction of the rocket

now we look for the final speed of the rocket, which as part of rest its initial speed is zero

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