Physics (Essay) Paper 2 May/June 2015

Question 1

(a)  What is a projectile?
(b)  Give the reason why the horizontal component of the velocity of a projectile
remains the same at every point of its flight.

Observation

This was a popular question among the candidates and it was fairly well attempted.  However, few candidates could not account for the reason why the horizontal component of the velocity of a projectile remains constant throughout its journey. Through their responses showed that, they were not totally ignorant of the answer.
 
The expected answers are:


1(a).     An object/ A body thrown/projected into the air and left to move under the influence of gravity (only).                                                                                                                                                                                    
(b)        The acceleration of free fall due to gravity/(g) does not act in the horizontal direction.