A rider on horse falls back when horse starts running all of a sudden ...
A rider on horse falls back when horse starts running, all of a sudden because the rider is in state of rest initially and later inertia of rest keeps the upper part of body at rest while lower part of the body moves forward with horse.
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A rider on horse falls back when horse starts running all of a sudden ...
Inertia of Rest and Inertia of Motion
When a rider on a horse falls back when the horse starts running all of a sudden, it is due to the concept of inertia. Inertia is the tendency of an object to resist changes in its state of motion. There are two types of inertia that are relevant to this situation: inertia of rest and inertia of motion.
Inertia of Rest
The upper part of the rider's body tends to stay at rest when the horse starts running suddenly because of inertia of rest. The rider's body was initially at rest while sitting on the horse, and as per Newton's first law of motion, an object at rest will remain at rest unless acted upon by an external force. Therefore, when the horse suddenly starts running, the lower part of the rider's body moves forward with the horse, but the upper part of the body tends to stay at rest due to inertia.
Inertia of Motion
As the lower part of the rider's body moves forward with the horse, it experiences inertia of motion. According to Newton's first law of motion, an object in motion will remain in motion with the same speed and in the same direction unless acted upon by an external force. The horse's sudden acceleration creates a forward force on the lower part of the rider's body, causing it to move forward with the horse.
Resultant Effect
Due to the inertia of rest and inertia of motion, the rider's body experiences a resultant effect. The lower part of the body moves forward with the horse, while the upper part tends to stay at rest. This causes the rider to lose balance and fall back.
Conclusion
In conclusion, when a rider on a horse falls back when the horse starts running all of a sudden, it is due to the inertia of rest and inertia of motion. The upper part of the body tends to stay at rest while the lower part moves forward with the horse, resulting in the rider falling back.
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