differentiation

Question: The motion of stone thrown up vertically is given by $s=13.8t-4.9{{t}^{2}}$ , where s is in metre and t is in seconds. Then its velocity at $t=1$ second is



1) 3 m/s
2) 5 m/s
3) 4 m/s
4) None of these
Solution: Explanation: No Explanation
Application of Derivatives

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