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Class 11 · Ch 3: Dynamics · Newton's Second Law
Step 1 / 4
Start — one object, no force.
A 5 kg box sits still on the ground. No force is being applied to it — so there is no acceleration, no motion. With no force, nothing changes.
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If F = 0, then a = 0
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A 5 kg object has a 20 N force applied to it. What is its acceleration?
Step 1: F = ma → a = F/m
Given: F = 20 N, m = 5 kg
a = 20 / 5 = 4 m/s²
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