QUESTION 3 (Start on a new page) Two identical objects (A and B) are projected vertically upwards from the ground 0,04 seconds apart. Object A has an initial velocity of v and object B has an initial velocity of 11,025 m-s-1. After both objects are released, their motion can be described as free fall. The motion of the objects is presented on the following position-time graph. vi Position (m) A B Time (s) 0,04 1,5 3.1 Define the term free fall. (2) 3.2 If object A takes 1,5 s. to return to the ground, prove that the object was projected upwards with an initial velocity of 7,35 m-s-1. (2) 3.3 3.4 Calculate the maximum height of object B above the ground. (3) As object B falls back to the ground, it lands on the roof of a house at the EXACT SAME TIME that object A hits the ground. Calculate the height of the roof. (3) 3.5 Determine the time at which the two objects are at exactly the same height above the ground. (5) [15]​