If a ball is thrown vertically with speed u, the distance covered during the last t seconds of its ascent is:
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If a ball is thrown vertically with speed u, the distance covered during the last t seconds of its ascent is:

G1 Physics · Accepted Answer

Step 1: Total time of ascent is T=u/g. Step 2: The speed t seconds before reaching the top is gt because the speed becomes zero after an additional time t under deceleration g. Step 3: Over the last t seconds, average speed is (gt+0)/2, so distance = ½gt². Final answer: B.