Given: F = 120N
a = 5m/s
Unknown: m = ?
Formula: m = F/a
where in, m = mass
F = force
a = acceleration
Note: Derive the original formula for second law of motion to get the formula you need for this problem, or simply follow these steps:
• F = ma ← original formula
• F = ma ← divide both sides by a
• F/a = ma/a ← cancel like terms
• F/a = m ← final formula
Solution:
m = F/a
= 120N / 5m/s
= 24kg
Final Answer: m = 24kg
