Book edition 1st Edition

Author(s) Paul Peter Urone

Pages 1272 pages

ISBN 9781938168000

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Short Answer

Why can we neglect forces such as those holding a body together when we apply Newton’s second law of motion?

Internal forces acting on a body are equal and opposite in direction, so their sum must be zero. Therefore, there can be no net force from the internal forces.

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TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Concept of Newton’s second law of motion

Newton’s second law of motion states that the acceleration of a system is directly proportional to the net external force acting on the system and is inversely proportional to the mass of the system. Mathematically,

$F_{n e t} = m a$

Herelocalid="1654165093803" $^{F_{n e t}}$ is the net force,localid="1654165395003" $^{m}$ is the mass, andlocalid="1654165421915" $^{a}$ is the acceleration.

Step 2: Explanation for neglecting the internal forces

According to Newton’s first law, the change in motion is due to the net external force. Internal forces are responsible for holding together a given body. The internal forces do not affect the motion of a body. The motion of a body is affected only by external forces.

Internal forces acting on a body are equal and opposite in direction, so their sum must be zero. Therefore, there can be no net force from the internal forces.

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College Physics (Urone)

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Short Answer

Why can we neglect forces such as those holding a body together when we apply Newton’s second law of motion?

Step by Step Solution

Step 1: Concept of Newton’s second law of motion

Step 2: Explanation for neglecting the internal forces

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College Physics (Urone)

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Short Answer

Why can we neglect forces such as those holding a body together when we apply Newton’s second law of motion?

Step by Step Solution

Step 1: Concept of Newton’s second law of motion

Step 2: Explanation for neglecting the internal forces

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