I think the answer is a although I'm not 100% sure. I think it's becuase it's natural and nothing man made has ever intervened with it
Answer:
Assuming that you meant the final velocity of 50 m/s was reached in 10 s, the answer would be 5 m/s^2.
Explanation:

So we update that with the values that we have.

then simplify that using algebra to solve for a and we get 5 m/s^2
False because the first law of motion is the crash I think I’m in middle school