The Deep Space 1 spacecraft’s ion engine produced an average thrust of 37 mN and was fired for a total of 16000 hours. The mass of the spacecraft was 450 kg. (a) Assuming this thrust was the only force acting on it, what was the spacecraft’s rate of acceleration? (b) By how much was its velocity changed over this time period?

NASA’s Saturn V rockets that launched astronauts to themoon were powered by the strongest rocket engine everdeveloped, providing 6.77 x 106 N of thrust while burningfuel at a rate of 2.63 x 103 kg/s. Calculate the engine’sexhaust speed.

Suppose that a person gets hit by a bus moving at 30 [mi/h] with a 58,000 [lbs] of force in the direction of motion. If the mass of the bus is 40,000 [lbs], person's is 150 [lbs] and if the impact lasts only 0.007 [s], determine how far away from the car, relative to the point of impact, will the person land. (Hint: Follow the center of mass and that the person’s center of mass is 2 [ft] from the ground.)

M of its initial mass to ME 3 A spaceship's orbital maneuver requires a speed increase of 1.05 x 10° m/s. If its engine has an exhaust speed of 2.85 x 10° m/s, determine the required ratio its final mass. (The difference M, - M, equals the mass of the ejected fuel.) HINT Need Help? Watch It Read It