Question

A rider on a horse falls back when the horse starts running, all of a sudden because

• A. the rider is taken back
• B. the rider is suddenly afraid of falling
• C. the inertia of rest keeps the upper part of the body at rest while the lower part of the body moves forward with the horse
• D. none of the above

Answer 1

The correct option is C

the inertia of rest keeps the upper part of the body at rest while the lower part of the body moves forward with the horse

Explanation of the correct answer

C: the inertia of rest keeps the upper part of the body at rest while the lower part of the body moves forward with the horse

1. When the horse starts running suddenly, then due to the inertia of the test the upper part of The rider's body remains at rest, while the lower part of the body starts moving with the horse.
2. As a result of which the rider pall back.

Explanation of the incorrect answer

A: the rider is taken back

1. Inertia is an inherent feature of all bodies that prevents them from changing their state of rest or uniform motion in a straight line on their own.

B: the rider is suddenly afraid of falling

1. When a horse starts running, the rider falls behind because the rider is first in a state of rest, and subsequently inertia of rest maintains the upper half of the body at rest while the bottom part of the body travels forward with the horse.

Hence, option (c) is correct.