1. A body projected in a vertical y (altitude) is given by y = 3t²+ 2t + 5, where t is in seconds.
Calculate (i) the velocity at time t
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y = 3t²+ 2t + 5
Differentiating both sides w.r.t x
Velocity at time t =
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y = 3t²+2t+5
dy/dt = 6t+2
bt differentiating both side w.r.t t
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