alleryStart learning →What is the center of gravity of a body?
AThe point where the pivot force is taken to act
BThe point of contact with its base of support
CThe point where its rotation speed is greatest
DThe point where its total weight is taken to act
Answer & Solution
Correct answer: D. The point where its total weight is taken to act
1. The weight of a body is really spread over its whole volume.
2. For torque calculations that spread weight can be replaced by a single force at one point.
3. That point is the center of gravity, where the total weight is assumed to be concentrated.
4. The base of support is where the body touches the ground, which is a different location entirely.
_Source: OpenStax College Physics (CC BY 4.0), Ch 9 "Statics and Torque", section 9.3 Stability_
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