A toy rocket fires its engines to launch it straight up from rest. After a short time, the engine turns off and the rocket continues before falling
back to the ground. The velocity - time graph for the rocket's complete
journey is shown.
60
SO
30
20
10
0
2
10
6 8
12 14
16
Time (s)
18 20
22 24
Velocity (m/s)
-10
-20
-30
40
-50
-60
-70
-80

Use the graph to calculate the acceleration of the rocket while the engine is working. Show all steps.