A rocket has an initial mass of 29,000 kg, of which 20% is the payload. It burns fuel at a rate of 175 kg/s and exhausts its gas at a relative speed of 1.8 km/s. a) Find the thrust of the rocket.  Solved: 315 kN b) Find the time until burnout. Solved: 132.57 s c) Find the rocket's final speed (in km/s) assuming it moves straight upward near the surface of Earth where the gravitational field g is constant. ?

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”