Question 4
A ball is projected vertically upwards with a velocity of 20 ms-1.
- Calculate the height attained 4 s after projection.
- What inference can you draw from your answer? [g = 10 ms-2]
Observation
This question was popular among candidates. Few candidates who attempted this question (a) and (b) performed woefully. Candidates were unable to indicate correct sign (-) in the equation to score full mark. Also, the question (b) required inference from question (a) which most candidates could not infer. Performance was low.
The expected answers
(b) The inference drawn is that, the ball returns to the point of projection