the basic motion equation of a projectile is given by h=(vt)-(gt^2) where h is the height in m, t is the time taken in s, v is the vertical component, g is the acceleration.

a)Find the expression for time of flight?
b)Specify the expression for h such that there is no real solution?

The time of flight is obtained when the vertical displacement is zero.

When there is no real solution, , from an equation in the form

The time of flight is obtained when the vertical displacement is zero.

When there is no real solution, , from an equation in the form