1. The problem statement, all variables and given/known data On the earth, an astronaut and the equipment weigh 1,960 N. Weightless in space, the motionless astronaut and equipment are accelerated by rocket pack with 100 N thrust, that fires for 2.0s. What is the resulting final velocity? (Hint: First calculate the acceleration. Also take the initial velocity as zero) 2. Relevant equations I am not sure how to solve for the Acceleration when mass is in Newtons and not Kg. I can not use the formula which I think i use which is f=ma. then the final velocity = acceleration * time - initial velocity 3. The attempt at a solution I divided 1960 N by 9.8 m/s^2= 200kg <<If that is right please explain because I don't understand. 200kg * a = 100N which equals a=0.5m/s^2 Vf = 0.5m/s^2 * 2sec - 0 = 1m/sec for the final velocity.