Determination Of Gravitational Constant

Determination Of Gravitational Constant

DeterminationOfGravitationalConstant
Cavendish Experiment
Apparatus
Torsion balance
Two small lead spheres
Two large lead spheres
Procedure
Suspend the torsion balance
Bring the large spheres close to the small ones
Observe the rotation
Results
Measurement of the torsion wire's twist
Calculation of G
Value of Gravitational Constant (G)
Units: m³ kg⁻¹ s⁻²
Magnitude: 6.67430(15) x 10⁻¹¹
Importance in Physics
Universal Gravitation
Orbital Mechanics