A space vehicle describing a circular orbit at a speed of 24×103 km/h releases its front end, a capsule that has a gross mass of 600 kg, including 400 kg of fuel. If the fuel is consumed at the rate of 18 kg/s and ejected with a relative velocity of 3000 m/s, determine (a) the tangential acceleration of the capsule as the engine is fired, (b) the maximum speed attained by the capsule.