An object takes 5 seconds to reach the ground from a height of 5 m on a planet. What is the value of ‘g’ on the planet ?

Q.2 (B)(i) An object takes 5 seconds to reach the ground from a height of 5 m on a planet. What is the value of ‘g’ on the planet ?

Doubtly Asked 25 Oct 2026 ssc 10th Save WhatsApp Report

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Answer: 0.4 m/s²

The object is dropped from rest, so u = 0, s = 5 m and t = 5 s. Using \(s = ut + \tfrac12 g t^2\):

\[5 = 0 + \frac12 g (5)^2 = 12.5\,g\]

\[g = \frac{5}{12.5} = 0.4\ \text{m/s}^2\]

Doubtly AI · 25 Oct 2026 AI-verified · Oct 2026 Report

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