2. A body is projected downwards at an angle of \( 30^{\circ} \) with the horizontal from the top of a building 170 m high. Its initial speed is \( 40 \mathrm{~m} / \mathrm{s} \).
i. How long will it take before striking the ground?
ii. Find out how far from the foot of the building the body will strike,
iii. At what the angle with the horizontal?
3. A body is projected from the ground at the angle of \( 30^{\circ} \) with the horizontal at an initial speed of \( 128 \mathrm{~m} / \mathrm{s} \), ignoring air friction, determine:
i. In how may seconds, it will strike the ground?
ii. How high it will go?
iii. What is its range will be?