At time t=0, a 2150kg rocket in outer space fires an engine that exerts an increasing force on it in the +x-direction. This force obeys the equation Fx=At2, where 1.45s is time, and has a magnitude of 781.25N when t = 1.45s .

Question

Find the SI value of the constant A.

Answer 1

Rearrange the equation:
A = F_x / t^2
Then simply substitute the numbers:
.: A = (781.25/1.45^2) N/s^2

Answer in three significant figures.