Question

The formula for critical velocity is v_c = √(GM/(R+h)). What does G represent?

Options

• Gravitational acceleration at Earth's surface

• Gravitational constant (6.67 × 10⁻¹¹ N·m²/kg²)

• Mass of the galaxy

• Gravitational potential energy

Answer 1

Gravitational constant (6.67 × 10⁻¹¹ N·m²/kg²)

Explanation:

G is the gravitational constant with a fixed value of 6.67 × 10⁻¹¹ N·m²/kg² used in the critical velocity formula.