Question

What is the importance of centre of mass​

Answer 1

Answer:

hey here is your answer

Explanation:

1.centre of the is hypothelial point at which entire mass of the body can be lows of motion assumed to be concentrated

2.centre of the mass is a location not a physical quantity

3.centre of the mass is partical of given objest for applying

4.centre of the is located on the centroid for a rigid body of uniform density

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Answer 2

Answer:

Centre of mass is a point where all the mass of the body is concentrated. The body at this point is balanced and hence no net torque(force) acts on it, thus the body remains in equilibrium.

It is important for

• The motion of earth-moon system
• Explosion of cracker
• Decay of radioactive nucleus

These can even be considered as examples of centre of mass

Explanation:

Motion of earth-moon system : Moon goes round the sun in a circular orbit & the earth goes round the sun in an elliptical orbit. It is more correct to say that the earth & the moon move in circular orbits about their common centre of mass which describes an elliptical orbit around the sun. The earth & the moon forms a system & their gravitational force of attraction is an internal force. The sun's attraction on both is an external force acting on their centre of mass as shown in the following figure. The earth & the moon are always on

the opposite sides of the centre of mass. As the mass of earth is heavier than that of moon, the centre of mass is very close to the earth.

Explosion of cracker: Consider a cracker which explodes in air. Before explosion, thecracker moves along a parabolic path. While in flight, it explodes. Each fragment follows itsown parabolic path. But the centre of mass of all the fragments continues to move alongthe same parabolic path. It is due to the fact that as there was no external force & theexplosion is caused by internal force only.

Decay of radioactive nucleus : When a radioactive nucleus at rest, decays into twofragments. The two fragments fly apart in opposite directons obeying the law ofconservation of momentum. But their centre of mass of the two fragments continues to beat rest. It is because of the fact that the parent nucleus was at rest

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