Question

A ball is allowed to fall from top of a tower takes time t1 to fall first half and t2 in second half then (t2+t1÷t1) is

Answer 1

Answer:

2t₂/(t₁-t₂)

Explanation:

For first half,

S/2=gt₁²....1

S=g(t₁+t₂)²....2

from 1

2gt₁²=g(t₁+t₂)²

2t₁²=(t₁+t₂)²

2t₁²=t₁²+t₂²+2t₁t₂

t₁²-t₂²=2t₁t₂

(t₁-t₂)(t₁+t₂)=2t₁t₂

(t₁+t₂)/t₁=2t₂/(t₁-t₂)