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Newton's Second Law: F = ma explained

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The key ideas and the summary sheet for this lesson are ready now.

Key ideas

  1. Acceleration is directly proportional to the resultant force.

  2. Acceleration is inversely proportional to the mass.

  3. F = m a: resultant force (N) = mass (kg) × acceleration (m/s²).

  4. Higher: inertial mass measures how hard it is to change an object's velocity.