Practice question
Question
A stone is dropped from a height of 45m on a planet where it takes 3s to reach the ground. What is the acceleration due to gravity on this planet?
Explanation
For free fall, s=½gt² and v²=2gh per NCERT. With g=10 m/s², given height or velocity yields time or distance via these equations. Substituting values gives result matching 10 m/s². This confirms option D as correct by uniformly accelerated motion equations.
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