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Chapter 4: Problem 11

A driver tells passengers to buckle their seatbelts, invoking the law of inertia. What's that got to do with seatbelts?

Short Answer

Expert verified
The concept of inertial is relevant to seatbelts in vehicles. When a moving car suddenly stops, the passengers inside tend to continue moving forward due to inertia. A seatbelt provides an external force that counters this motion, thus preventing possible injuries.

Step by step solution

01

Understanding the Law of Inertia

The law of inertia, also known as Newton's First Law of Motion, states that an object in motion will stay in motion, and an object at rest will stay at rest, unless acted upon by an external force. This is a basic principle in physics.
02

Applying to the Seatbelt Scenario

Now let's consider a moving car. When the car is moving, everything inside it, including the passengers, are moving too. If the car suddenly stops (due to a collision or abrupt braking), the car ceases its forward motion, but the passengers due to inertia, tend to keep moving in the same direction. This can result in passengers getting injured.
03

Role of Seatbelts

Here's where the seatbelts play a key role. A seatbelt provides an external force that can stop the passenger from continuing to move forward when the car stops. So, by 'invoking the law of inertia', the driver is implying the importance of wearing seatbelts since they help prevent injuries by providing an external force to counteract the passengers' inertia.

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