while on safari a tourist witnessed a 200 kg lion chasing down an 800 kg water buffalo, and eventually the lion jumping and grabbing on to the buffalo. before the collision the lion was running behind the buffalo at 20 m/s and the buffalo was running away from the lion at 25 m/s.
what is the combined speed of the lion and the buffalo after the collision
hard to say. The buffalo was running faster than the lion, so how did the lion catch it?
The lion must have come in at an angle, and without that information it's impossible to say.