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Chapter 12: Problem 7

How does a heavy keel help keep a boat from tipping over?

Short Answer

Expert verified
A heavy keel helps keep a boat from tipping over by lowering its center of gravity. Having a lower center of gravity makes the boat more stable and less likely to tip over as the weight concentrated at the bottom would require more energy to lift.

Step by step solution

01

Understanding Center of Gravity

The center of gravity is the average location of the weight of an object. We can think of gravity as acting through this point. For a stable object, the center of gravity needs to be directly over the base.
02

Understanding Buoyancy

Buoyancy is a force that opposes the weight of an object immersed in a fluid. This force is equal to the weight of the fluid displaced by the object.
03

How these apply to a boat

A boat floats by displacing a volume of water equivalent to its own weight. The shape of the boat determines how much water it displaces.
04

Introducing the keel

A boat with a heavy keel has much of its weight concentrated low, thus shifting the center of gravity downwards. This makes it harder for the boat to tip over as it would require more energy to lift the heavy keel out of the water.
05

The Role of Keel

The heavy keel as a form of ballast provides stability by lowering the boat's center of gravity, causing the boat to restore itself after being tipped, much like a weight at the bottom of a toy punching bag.

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