Help please!! look at the image

i believe

step-by-step explanation:

from my conclusion c

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²

step-by-step explanation:

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you can use a^2+ b^2=c^2