Question

What is the value of gravitational constant G?

Answer 1

Cavendish's aim was not actually to measure the gravitational constant, but rather to measure the Earth's density relative to water, through the precise knowledge of the gravitational interaction. In retrospect, the density that Cavendish calculated implies a value for G of 6.754 × 10⁻¹¹ m³ kg⁻¹ s⁻².