The mass of the sikorksky uh-60a helicopter is 9300kg it, Ask an Expert

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The mass of the Sikorksky UH-60A helicopter is 9300kg. It takes off vertically at t=0. The pilot advances the throttle so that the upward thrust of its engine (in kN) is given as a function of time in seconds by T= 100 + 2t^2

a) How fast is the helicopter rising 3 seconds after it takes off?

b) How high has it risen 3 seconds after it takes off?

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