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Explain Newton's second law of motion with examples

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← AI Answer 📝 Concise

Q: Explain Newton's second law of motion

1

The Core Law

Force equals mass times acceleration. The net force on an object is directly proportional to its acceleration.

F = m × a

2

Real-World Example

Pushing a shopping cart: more force = faster acceleration. A heavier cart needs more force for the same speed.

3

Key Insight

If you double the mass, you need double the force. If you double the force, you double the acceleration.

4

Units

Force in Newtons (N), Mass in kg, Acceleration in m/s². 1N = 1kg × 1m/s²

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Question 3

According to Newton's second law, if you double the mass while keeping force constant, what happens to acceleration?

A

It doubles

B

It halves ✓

C

It stays the same ✗

D

It quadruples

💡 Explanation

F = ma → a = F/m. If m doubles while F stays same, a = F/(2m), so acceleration halves.

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