The escape speed from an object is v2 = 2gm/r, where m is the mass of the object, r is the object's starting radius, and g is the gravitational constant 6.67 × 10-11 m3 kg-1 s-2. what is the approximate escape speed, in km/s, from the solar system starting from an orbit at 1.0 au? in this case, the mass of the sun, 2.3e+30 kg, can be used as the mass of the solar system

Approximate escape speed = 45.3 km/s

Explanation:

Escape speed

Here we have

   Gravitational constant = G = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

   R = 1 AU = 1.496 × 10¹¹ m

   M = 2.3 × 10³⁰ kg

Substituting

Approximate escape speed = 45.3 km/s

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -