https://www.bbc.com/news/science-environment-52867494

The following data was taken from the video:

t = 0.0 s, v = 0 km/h

t = 20.0 s, v = 274 km/h

t = 30.0 s, v = 462 km/h (an increase of 188 km/h in 10.0 s)

t =40.0 s, v = 689 km/h (an increase of 227 km/h in 10.0 s)

t = 50.0 s, v = 859 km/h (an increase of  170 km/h in 10.0 s)

What does it say about the acceleration of the rocket?

 

If rockets were transparent:

Launch to orbit in real time Fuel Burn and Staging of the Saturn V, Space Shuttle,Falcon Heavy and the Space Launch System (SLS) rockets