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Question

A stone falls from a height of 98m on a planet and takes 3.5s to reach the ground. What is the gravitational acceleration on this planet?

Options

Choose one · Correct answer highlighted

Explanation

h=12gt2, 98=12g(3.5)2⇒98=6.125g⇒g=16m/s2. 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 16 m/s² as the result, so option D is correct.