Speed, Velocity or Acceleration? Olympic runner, Usain Bolt
is able to increase his
speed faster than any
runner in his heat.

Acceleration

Explanation:

Speed is just how fast an object is moving (i.e. 3mph). Velocity is speed in a direction (i.e. 3mph west).

Acceleration is how fast or slow speed is changing, which is what Usain Bolt is doing (increasing his speed).

basically anything for school but for getting t=into clubs or doing any legal things well it actually depends on what legal thing your doing but definitely not for drinking or going to the club or other things like that.