I'll explain first:
You use the formula for Newton's second law of motion.
The formula is so simple, and it solves so many problems,
that it's actually a good idea to memorize it.
(I learned it 58 years ago, and I still remember it.)
The formula is F = M A
It means Force = (mass) x (acceleration)
In this question, you know the force, and you know the mass,
so calculating the acceleration is a piece-o-cake.
Force = (mass) x (acceleration)
(5,050 N) = (520 kg) x (acceleration)
Divide each side by 520 kg : (5,050 N / 520 kg) = acceleration
Acceleration = 9.712 m/s² (rounded)
