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Fahemeni · 2026

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Physics Final Exam — Chapter 4

The relationship between force and acceleration is one of the most fundamental principles in classical mechanics...

According to Newton's Second Law of Motion, when a net force acts on an object of mass m, it produces an acceleration a, described by F = ma

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where F is measured in Newtons...

This law forms the foundation of dynamics and explains how objects respond to applied forces in various physical scenarios...

Question 3: A 4 kg object accelerates at 6 m/s². Calculate the net force acting on the object and explain your reasoning...

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In simple terms:

Newton's 2nd Law means: more force = more acceleration, but heavier objects need more force to move the same way.

The formula:

F = m × a
F
Force (N)
m
Mass (kg)
a
Accel. (m/s²)

Answer to Q3:

F = 4 kg × 6 m/s² = 24 N

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