Observation

Majority of the candidates attempted the questions but few answered correctly while the rest failed because of poor language expression.

The expected answers are

                     Explanation of terms in projectile motion

(a)        Time of flight

The duration from the time of projection to landing.

(b)        Maximum height
The longest vertical distance the projectile attains (when the vertical velocity is zero).

(c)        Range
The horizontal distance between the point of projection and the landing position
OR
The horizontal distance covered during the duration of flight.