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Question

A ball is thrown vertically upwards with 30m/s. How long does it take to return to the ground? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Time to reach max height: v=v0+at, 0=30−10t⇒t=3s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 6 s as the result, so option D is correct.