The position coordinate of a moving particle is given by x=6+18t+9t2, where x is in meters and t in seconds. What is the velocity at t=2s?
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Answer: 54 m/s
Explanation: You first have to differentiate the function given to you which will result in dx/dt =instantaneous velocity
The result of differentiation would be 18+18t wherein by substituting the value of t as 2 we get the answer 54 m/s
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