In a projectile motion let `t_(OA)=t_(1)` and `t_(AB)=t_(2)`.The horizontal displacement from `O` to `A` is `R_(1)` and from `A` to `B` is `R_(2)`.Maximum height is `H` and time of flight is `T`.If air drag is to be considered, then choose the correct alternative(s).

Options

A. `t_(1)` will decrease while `t_(2)` will increase
B. H will increase
C. `R_(1)` will decrease while `R_(2)` will increase
D. T may increase or decrease

Answer

A, D

Explanation

As air drag reduces the vertical component of velocity so time to reach maximum height will decrease and it will decrease the downward vertical velocity hence time to fall on earth increases.