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2 cards from this section. Quick, good the night before a test.
Define centre of gravity.
Think about where an object can be balanced.
How can you find the CG of a balanced object?
Consider an experiment with a pencil.
Where is the center of gravity (CG) of an object located?
Think about balancing the object on a finger.
True or False: An object can have a CG outside its physical material.
Consider the arrangement of mass around a point.
A person balances a 10 kg plank horizontally on a pivot. If one side has a 5 kg weight placed 1 m from the pivot, where should a 2 kg weight be placed on the opposite side to balance the plank?
Remember that torque = force × distance.
An engineer designs a crane with a CG that must remain below a certain height for safety. If the crane is 10 m tall and its weights are distributed unevenly, how can the engineer ensure the CG remains stable?
Consider redistributing heavier weights towards the base.
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