200
An unruly Augustine School student, in an effort to let off some steam, decided to punch a watermelon. If the watermelon (mass of 21 kg) is sitting on the table at rest when it is punched, and the student’s fist was in contact with the melon for 0.25 seconds, and after the punch it is traveling at a rate of 6.3 m/s, what was the force that the student applied?
529 N