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A small rocket engine is attached to a sled (with the total mass of the device at 7.5 kg) that is placed on a frozen

A small rocket engine is attached to a sled (with the total mass of the device at 7.5 kg) that is placed on a frozen pond with negligible friction. If the power produced by the rocket is 16.7W with respect to the time after launch, what is the velocity of the device 2.0 seconds after the rocket motor starts?

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