An aeroplane runs for some distance on the run way before taking off. Why?

Why does an airplane run a certain length on the runway first before taking off ?

Assertion: Aeroplanes are made to run on the runway before take off, so that they acquire the necessary lift. Reason: This is as per Bernoulli's theorem.

Assertion: Aeroplanes are made to run on the runway before take off, so that they acquire the necessary lift. Reason: This is as per Bernoulli's theroem.

Assertion : Aeroplanes are made to run on the runway before take off, so that they acquire the necessary lift. Reason : According to Bernoulli's theorem, as velocity increases pressure decreases and viceversa.

Assertion : Aeroplanes are made to run on the runway before take off, so that they acquire the necessary lift. Reason : According to Bernoulli's theorem, as velocity increases pressure decreases and viceversa.

Why athlete taking long jump run for some distance before taking jump