9702/12/M/J/15: A firework rocket is fired vertically upwards. The fuel burns and produces a constant upwards force on the rocket. After 5 seconds there is no fuel left. Air resistance is negligible. What is the acceleration before and after 5 seconds? #9702s15p12 #Lv3 #ASdynamicsP1 #ASnewton2ndP1 #ASDynamics Playlist • Ch3 Dynamics | CAIE 9702 AS Physics Instagram Pocket Guide ( / etphysics ) More Resources (https://9702-physics.blogspot.com/) Support us! ( / etphysics ) Tuition/Tutoring inquiries: Email: [email protected] Whatsapp: https://wa.me/60126679171 9702_s15_qp12 #CambridgeALevelPhysics