Define gravitational force. Give its examples.
Define gravitational force. Give its examples.
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Force of attraction between two (point) masses separated by a distance is called as gravitational force.
F = \(G\frac{m_1m_2}{r^2}\)
where ‘G’ is constant called the universal gravitational constant = 6.67 × 10-11 Nm2/kg2
Examples:
1. The motion of moon, artificial satellites around the earth and motion of planets around the sun is due to gravitational force of attraction.
2. The concept of weight of a body in the earth’s gravitational field is due to gravitational force exerted by the earth on a body.
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