Motion in A Straight Line

Question: The coordinates of a moving particle at any time are given by \[x = a{t^2}\] and \[y = b{t^2}\]. The speed of the particle at any moment is



1) \[2t(a + b)\]
2) \[2t\sqrt {({a^2} - {b^2})} \]
3) \[t\,\sqrt {{a^2} + {b^2}} \]
4) \[2t\sqrt {({a^2} + {b^2})} \]
Solution: Explanation: Explanation
non-uniform-motion

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