The physics of human motion (re. a sword swing)

In summary, the weight, balance, length, angle, and position of the body all play important roles in the efficiency and effectiveness of a sword swing. A heavier sword will require more force to swing, while a well-balanced sword will be easier to control. The length of the sword affects its moment of inertia and reach, and the angle of the swing can distribute force over a wider area. The position of the body is crucial in generating maximum force and maintaining balance and control during a swing.
  • #1
Adam
65
1
Hello all, another question.

Can anyone explain to me please the details of, for example, a person swining a sword? How much body mass is involved, from which point do I measure the arc of the swing, how much energy is involved, et cetera?

Thanks.
 
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  • #2
Assuming that you can throw ~10 lb sword (or other 10 lb mass) about 15-20 ft up you get K = P = mgh ~ 20-25 Joules, sword speed v=(2gh)1/2 ~ 30 ft/sec.

Swing point - your shoulder.
 
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1. How does the weight of a sword affect the swing?

The weight of a sword can have a significant impact on the physics of a sword swing. A heavier sword will require more force to swing and will have a slower acceleration, while a lighter sword will require less force and will have a faster acceleration. This affects the speed and power of the swing, as well as the amount of control the wielder has over the sword.

2. What role does balance play in a sword swing?

Balance is crucial in a sword swing as it determines how easy or difficult it is to manipulate the sword. A well-balanced sword will have its center of mass located near the hilt, making it easier to control and maneuver. A poorly balanced sword, on the other hand, will have its center of mass further up the blade, making it more difficult to control and requiring more force to swing.

3. How does the length of a sword affect its swing?

The length of a sword can significantly impact its swing. A longer sword will have a larger moment of inertia, meaning it will require more force to accelerate and will have a slower swing speed. However, a longer sword also means a longer reach and more potential for leverage, making it more powerful in certain types of swings.

4. What is the relationship between the angle of the swing and the force exerted?

The angle of the sword swing can greatly affect the amount of force exerted. If the sword is swung in a straight line, the force will be concentrated in that direction. However, if the sword is swung in an arc, the force will be distributed over a wider area, making it less powerful in one specific direction but potentially more effective in hitting a larger target area.

5. How does the position of the body affect the efficiency of a sword swing?

The position of the body is crucial in generating an efficient sword swing. The feet should be planted firmly on the ground, and the body should rotate with the swing to transfer maximum force from the legs and core to the arms and sword. The position of the body also affects the balance and control of the sword, making it easier or more difficult to execute a precise and powerful swing.

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