5. the radius of the earth is approximately 6,000 kilometers. the acceleration of an astronaut in a perfectly circular orbit 300 kilometers above the earth would be most nearly?

a = 10 m/s²

Explanation:

given,

Radius of earth = 6,000 Km

distance from earth = 300 Km

distance from the earth =

        = 6000 x 10³ + 300 x 10³

        = 6300 x 10³ m

       = 6.3 x 10⁶ m

we know,

F = m a

gravitational force

G is gravitational constant = 6.67 x 10⁻¹¹ m³/kg.s²

M is mass of earth = 5.972 x 10²⁴ Kg

a = 10 m/s²

acceleration of an astronaut is equal to 10 m/s²