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If maching is lubricated with oil...

If maching is lubricated with oil

A

the mechanical advantage of the machine increases

B

the mechanical efficiency of the machine increases

C

both its mechanical advantage and efficiency increase

D

its efficiency increases, but its mechanical advantage decreases.

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SL ARORA-Work, Energy and power-EXERCISE
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  10. A block of mass 2 kg is free to move along the x-axis. It at rest and ...

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  11. A block (B) is attached to two unstriched sprig S(1) and S(2) with spr...

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