physics

A small weather rocket weighs 14.7 N. The rocket is carried up by a balloon. The rocket is
released from the balloon and fired, and its engine exerts an upward force of 10.2 N on the
rocket. What is the acceleration of the rocket?

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1. F = mg,
m = F/g = 14.7/9.8 = 1.5kg = Mass of the rocket.

a = Fn/m = (-14.7+10.2) / 1.5 = -3m/s^2
, Downward.

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