Skip to content

Question

A stone falls from a height and covers 58.8m in the last 1.2s of its fall. What is the total height? (Take g\=9.8m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Total time = t, last 1.2 s: 58.8=9.8t−4.9(t−1.2)2. 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 210 m as the result, so option A is correct.