Question

stone a stone is dropped from 10 metre height find the time taken to reach the ground

Answer 1

S=ut+1/2at×t1/2+a×t×t125mts so height from which object is dropped is 125mts125/5×3=45mtsDistance left to be traveled is 125-45=80mtsTherefore time taken=√(2s/a)=4seconds ansSince uis the initial velocity it is zero in all the cases