A 2670-kg test rocket is launched vertically from the launch pad. Its fuel (of n

Question

A 2670-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 + Bt2, where A and B are constants and time is measurement from the instant the fuel is ignited. At the instant of ignition, the rocket has an upward acceleration of 1.20 m/s2 and 2.00 s later an upward velocity of 1.85 m/s. Determine A. Determine B. At 4.10 s after fuel ignition, what is the acceleration of the rocket?

Explanation / Answer

A) - 0.138 m/s2

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