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a. An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?
in Chapter 1: Gravitation by Expert (11.5k points)
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Given : Time= 5s , Height=5m

To find : Gravitational acceleration 

Formula: \(S=ut+\tfrac{1}{2}gt^2\) 

steps: 

by formula

\(5=0\times t+\tfrac{1}{2}g(5)^2\)

\(5=\tfrac{1}{2}g\times25\)

\(\therefore g=\tfrac{2}{5}\)

\(\therefore g=0.4 m/s^2\)

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