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Find the average velocity for the time i...

Find the average velocity for the time intervals `Deltat=t_(2)-0.75` when `t_(2)` is 1.75 ,1.25 and 1.0 s. What is the instantaneous velocity at t=0.75 s?

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The correct Answer is:
About `2ms^(-1); 2.7ms^(-1);3.2 ms^(-1); 4.0ms^(-1)` from slope at `0.75 s`
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