None. They're just different names.
The company that made them popular, is called Rollerblade. Because of that name, they were called rollerblades. That means that this isn't the actual name, and the correct name is "inlines" or "inline skates" or "inline rollerskates", though I haven't heard of the latter.
It's not fine, because there are other manufacturers, like, for example, K2...
I have a pair of roller skates. no.
The speed skates have longer blades
Roller Skates has 186 pages.
Roller skates Roller skates
Roller blades are much faster and better. The roller skates are not as flexible as roller blades are. It's much safer to wear roller blades than roller skates and roller skates are likely to trip you up than roller blades. Also roller blades have more control than roller skates.
No its not
When did hooter girls wear skates
Wood and leather. See the history of roller skates linked below.
the man who invented roller skates was 100000000 years old
Roller Skates of America, 1979-1983, owner
No!
Action and reaction forces work while roller staking by the action force being that you and your roller skates move forward. The reaction force is when the roller skates slide backwards on the ground.