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Test rocket is launched vertically from the launch pad

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A 2530-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass) provides a thrust force so that its vertical velocity as a function of time is given by v(t) = At + Bt^2 , where A and B are constants and time is measured from the instant the fuel is ignited. At the instant of ignition, the rocket has an upward acceleration of 1.00 m/s^2 and 1.30 s later an upward velocity of 1.70 m/s .

A) Determine A.

B) Determine B.

C) At 3.70 s after fuel ignition, what is the acceleration of the rocket?

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The expert tests rockets launched from a launch pad.

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