Define Critical Velocity.

ANSWER : Critical Velocity, also known as Escape Velocity, refers to the minimum velocity required for an object to overcome the gravitational pull of a celestial body and move away from it indefinitely. In simpler terms, it is the speed at which an object must travel to break free from the gravitational forces holding it back.

The formula to calculate critical velocity is given by :

V = \(\sqrt{\frac{{2GM}}{{r}}}\)

where :

- V represents the critical velocity

- G is the universal gravitational constant [approximately 6.674 × 10^(-11) m³/(kg·s²)]

- M is the mass of the celestial body (e.g., Earth)

- r is the distance between the center of the celestial body and the object

To understand the formula, we need to grasp its terms. G is a constant that defines the strength of gravitational attraction, and M represents the mass of the celestial body. The distance (r) between the object and the center of the celestial body plays a crucial role in determining the critical velocity.

By calculating the critical velocity using this formula, we can determine the minimum speed required for an object to break free from a celestial body's gravitational pull and venture into 

Also Read : What is Current Density? Write its Dimension.

Also Read : State Ampere's Law.

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