Example: To solve this given word problem we can first identify the given and the apt formula to use in this phenomenon: Given: Force = 4, 500 N = 4, 500 kg-m/s^2 Acceleration = 5 m/s^2 Formula: f=ma Derivation: m = f/a Solution: 1. M = f/a 2. M = 4,500 kg-m/s^2 / 5 m/s^2 3. M = 900 kg