Question
Define gravitational force. Give its examples.
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Answer
Force of attraction between two (point) masses separated by a distance is called as gravitational force.
$F=G \frac{m_1 m_2}{r^2}$
where ' G ' is constant called the universal gravitational constant =
$6.67 \times 10^{-11} Nm ^2 / kg ^2$
Examples:
$F=G \frac{m_1 m_2}{r^2}$
where ' G ' is constant called the universal gravitational constant =
$6.67 \times 10^{-11} Nm ^2 / kg ^2$
Examples:
- The motion of moon, artificial satellites around the earth and motion of planets around the sun is due to gravitational force of attraction.
- 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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