A constant force of 100N , directed upward, is applied to a 5.0kg toy rocket by the rocket's engine.

Find the rockets acceleration?

I thought it'd be as simple as F=ma to be 20 m/s2 but I was wrong. What am I overlooking?

2 answers

ROCKETS ACCELERATION IS 200 M/S2
200 m/s2 is still incorrect as well.