The expected life of a ball bearing subjected to a load of 9800 N and – McqOptions

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1.	The expected life of a ball bearing subjected to a load of 9800 N and working at 1000 rpm is 3000 hours. What is the expected life of the same bearing for a similar load of 4900 N and speed of 2000 rpm?
A.	12,000 hours
B.	6,000 hours
C.	1,500 hours
D.	Unchanged
Answer» B. 6,000 hours

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