A ball bearing operating at a load F has 8000 hours of life.

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A ball bearing operating at a load F has 8000 hours of life. The life of the bearing, in hours, when the load is doubled to 2F is

1. 8000
2. 6000
3. 4000
4. 1000

Correct Option: D

Life ∝	1
	(Load)³

∴ New Life =	8000	= 1000 hours
	(2)³